CVE-2019-11708

CRITICALNVD 10.010.0
EchelonGraph scoreHIGH confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score elevated to 10.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-05-23), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 10.0 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: CISA Known Exploited Vulnerabilities catalog, EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this weekExploited in the wild

Also known asEUVD-2019-3378 (ENISA EUVD) · GHSA-w2hj-6j62-2w9f (GitHub Security Advisories)Source: ENISA EUVD

10.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at low or medium mission impact
CISA-KEV: ExploitedEPSS PROB: 56%CVSS: 10.0Exploit: Public PoCExposed services: Not assessed

A fix is available — apply it.

Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxed parent process opening web content chosen by a compromised child process. When combined with additional vulnerabilities this could result in executing arbitrary code on the user's computer. This vulnerability affects Firefox ESR < 60.7.2, Firefox < 67.0.4, and Thunderbird < 60.7.2.

CVSS v3
10.0
EG Score
10.0CRITICALhigh confidence
EG Risk
85
EG Risk 85/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity100% × 45%
Impact severity (EG Severity): CVSS 10.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation100% × 40%
Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Attend at medium and Act at high mission impact.
Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.
EPSS PROB
56%
EPSS %ILE
99th
KEV
⚠ Exploited

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.

EG Severity
10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
56% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
CISA KEV and EG-KEV Tier 1 (exploited in the wild)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Attend at medium mission impactTrack at low, Attend at medium and Act at high mission impact.CISA BOD 26-04: 3 days & forensic triage if the affected system is publicly exposed; 14 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Attend at medium and Act at high mission impact.

A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days & forensic triage if the affected system is publicly exposed; 14 days if it is not.

The score's inputs: In CISA KEV yes (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

CISA required action“Apply updates per vendor instructions.”

Quoted verbatim from CISA's Known Exploited Vulnerabilities catalog. CISA directs it at US federal civilian executive branch agencies under Binding Operational Directive (BOD) 26-04, which replaced BOD 22-01 on 10 June 2026; it is not EchelonGraph's advice. CISA's notes: https://nvd.nist.gov/vuln/detail/CVE-2019-11708

Published

July 23, 2019

Last Modified

October 27, 2025

Advisory Details (5)

Auto-updated Nov 1, 2026
⚠️ Actively exploited (CISA KEV, CISA Vulnrichment). Patch available.
Web page

Security vulnerabilities fixed in Thunderbird 60.7.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2019-20/
Web page

Security vulnerabilities fixed in Firefox 67.0.4 and Firefox ESR 60.7.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2019-19/
Web page

Mozilla Firefox: Multiple vulnerabilities (GLSA 201908-12) — Gentoo security

https://security.gentoo.org/glsa/201908-12
Web page

1559858 - (CVE-2019-11708) Sending `Prompt:Open` from the child allows for a sandbox escape

https://bugzilla.mozilla.org/show_bug.cgi?id=1559858

Patch Availability(8)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuxul-ext-lightning (1:60.7.2+build2-0ubuntu0.16.04.1) @ xenial2026-11-01ubuntu
ubuntufirefox-testsuite (67.0.4+build1-0ubuntu0.16.04.1) @ xenial2026-11-01ubuntu
redhatfirefox-0:60.7.2-3.el8_02019-07-08redhat
redhatthunderbird-0:60.7.2-2.el6_102019-06-27redhat
redhatthunderbird-0:60.7.2-2.el7_62019-06-27redhat
redhatthunderbird-0:60.7.2-2.el8_02019-06-27redhat
redhatfirefox-0:60.7.2-1.el7_62019-06-25redhat
redhatfirefox-0:60.7.2-1.el6_102019-06-25redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(14 across 9 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 60.7.2esr-1: fixed in 60.7.2esr-1
—
thunderbird—
  • every version up to 1:60.7.2-1: fixed in 1:60.7.2-1
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 60.7.2esr-1: fixed in 60.7.2esr-1
—
thunderbird—
  • every version up to 1:60.7.2-1: fixed in 1:60.7.2-1
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 60.7.2esr-1: fixed in 60.7.2esr-1
—
thunderbird—
  • every version up to 1:60.7.2-1: fixed in 1:60.7.2-1
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 60.7.2esr-1: fixed in 60.7.2esr-1
—
thunderbird—
  • every version up to 1:60.7.2-1: fixed in 1:60.7.2-1
—
Debian:9(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr45.9.0esr-1 ... 60.7.1esr-1~deb9u1 (107 versions)
  • every version up to 60.7.2esr-1~deb9u1: fixed in 60.7.2esr-1~deb9u1
—
thunderbird1.5-4 ... 1:60.7.2-1~deb8u1 (81 versions)
  • every version up to 1:60.7.2-1~deb9u1: fixed in 1:60.7.2-1~deb9u1
—
Alpine:v3.10(1)
PackageVulnerable rangeFix by version rangeDependents
mozjs60—
  • every version up to 60.7.2-r0: fixed in 60.7.2-r0
—
Alpine:v3.11(1)
PackageVulnerable rangeFix by version rangeDependents
mozjs60—
  • every version up to 60.7.2-r0: fixed in 60.7.2-r0
—
Alpine:v3.12(1)
PackageVulnerable rangeFix by version rangeDependents
mozjs60—
  • every version up to 60.7.2-r0: fixed in 60.7.2-r0
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
thunderbird1.5-4 ... 1:60.7.1-1~deb9u1 (80 versions)
  • every version up to 1:60.7.2-1~deb8u1: fixed in 1:60.7.2-1~deb8u1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(8)

Data Freshness Timeline

(refreshed 25× in last 7d / 212× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 1,898 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 1,798 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 14:09 UTCEG score recompute
  2. 2026-11-01 14:09 UTCVendor advisory
  3. 2026-11-01 14:09 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  4. 2026-10-31 16:27 UTCEPSS rescoreEPSS 56% · 99th percentile
  5. 2026-10-31 13:49 UTCEG score recompute
  6. 2026-10-31 13:49 UTCVendor advisory
  7. 2026-10-31 13:49 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  8. 2026-10-30 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  9. 2026-10-30 13:30 UTCEG score recompute
  10. 2026-10-30 13:30 UTCVendor advisory
  11. 2026-10-30 13:30 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  12. 2026-10-29 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  13. 2026-10-29 13:11 UTCEG score recompute
  14. 2026-10-29 13:11 UTCVendor advisory
  15. 2026-10-29 13:11 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  16. 2026-10-28 16:27 UTCEPSS rescoreEPSS 56% · 99th percentile
  17. 2026-10-28 12:50 UTCEG score recompute
  18. 2026-10-28 12:50 UTCVendor advisory
  19. 2026-10-28 12:50 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  20. 2026-10-27 16:27 UTCEPSS rescoreEPSS 56% · 99th percentile
  21. 2026-10-27 12:31 UTCEG score recompute
  22. 2026-10-27 12:31 UTCVendor advisory
  23. 2026-10-27 12:31 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  24. 2026-10-26 12:12 UTCVendor advisory
  25. 2026-10-26 12:11 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
Show 75 more
  1. 2026-10-25 19:11 UTCEG score recompute
  2. 2026-10-25 16:27 UTCEPSS rescoreEPSS 56% · 99th percentile
  3. 2026-10-25 11:53 UTCEG score recompute
  4. 2026-10-25 11:53 UTCVendor advisory
  5. 2026-10-25 11:53 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  6. 2026-10-24 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  7. 2026-10-24 11:34 UTCEG score recompute
  8. 2026-10-24 11:34 UTCVendor advisory
  9. 2026-10-24 11:34 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  10. 2026-10-23 16:27 UTCEPSS rescoreEPSS 56% · 99th percentile
  11. 2026-10-23 11:15 UTCEG score recompute
  12. 2026-10-23 11:15 UTCVendor advisory
  13. 2026-10-23 11:15 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  14. 2026-10-22 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  15. 2026-10-22 10:55 UTCEG score recompute
  16. 2026-10-22 10:55 UTCVendor advisory
  17. 2026-10-22 10:55 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  18. 2026-10-21 16:27 UTCEPSS rescoreEPSS 56% · 99th percentile
  19. 2026-10-21 10:34 UTCEG score recompute
  20. 2026-10-21 10:34 UTCVendor advisory
  21. 2026-10-21 10:33 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  22. 2026-10-20 16:27 UTCEPSS rescoreEPSS 56% · 99th percentile
  23. 2026-10-20 10:12 UTCEG score recompute
  24. 2026-10-20 10:12 UTCVendor advisory
  25. 2026-10-20 10:11 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  26. 2026-10-19 16:27 UTCEPSS rescoreEPSS 56% · 99th percentile
  27. 2026-10-19 09:47 UTCEG score recompute
  28. 2026-10-19 09:47 UTCVendor advisory
  29. 2026-10-19 09:46 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  30. 2026-10-18 09:26 UTCEG score recompute
  31. 2026-10-18 09:26 UTCVendor advisory
  32. 2026-10-18 09:26 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  33. 2026-10-17 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  34. 2026-10-17 09:05 UTCEG score recompute
  35. 2026-10-17 09:05 UTCVendor advisory
  36. 2026-10-17 09:05 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  37. 2026-10-16 16:31 UTCEPSS rescoreEPSS 56% · 99th percentile
  38. 2026-10-16 08:45 UTCEG score recompute
  39. 2026-10-16 08:45 UTCVendor advisory
  40. 2026-10-16 08:45 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  41. 2026-10-15 16:27 UTCEPSS rescoreEPSS 56% · 99th percentile
  42. 2026-10-15 08:24 UTCEG score recompute
  43. 2026-10-15 08:24 UTCVendor advisory
  44. 2026-10-15 08:24 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  45. 2026-10-14 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  46. 2026-10-14 08:05 UTCEG score recompute
  47. 2026-10-14 08:05 UTCVendor advisory
  48. 2026-10-14 08:05 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  49. 2026-10-13 16:27 UTCEPSS rescoreEPSS 56% · 99th percentile
  50. 2026-10-13 07:45 UTCVendor advisory
  51. 2026-10-13 07:45 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  52. 2026-10-12 20:04 UTCEG score recompute
  53. 2026-10-12 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  54. 2026-10-12 07:25 UTCVendor advisory
  55. 2026-10-12 07:25 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  56. 2026-10-12 03:22 UTCVendor advisory
  57. 2026-10-12 03:22 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  58. 2026-10-11 23:21 UTCVendor advisory
  59. 2026-10-11 23:20 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  60. 2026-10-11 19:21 UTCEG score recompute
  61. 2026-10-11 19:21 UTCVendor advisory
  62. 2026-10-11 19:21 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  63. 2026-10-11 15:21 UTCEG score recompute
  64. 2026-10-11 15:21 UTCVendor advisory
  65. 2026-10-11 15:21 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  66. 2026-10-11 13:41 UTCEPSS rescoreEPSS 56% · 99th percentile
  67. 2026-10-11 11:21 UTCEG score recompute
  68. 2026-10-11 11:21 UTCVendor advisory
  69. 2026-10-11 11:21 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  70. 2026-10-11 07:22 UTCVendor advisory
  71. 2026-10-11 07:22 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  72. 2026-10-11 03:22 UTCVendor advisory
  73. 2026-10-11 03:22 UTCGHSA enrichmentGHSA-w2hj-6j62-2w9f · GitHub severity CRITICAL · GitHub CVSS 10.0
  74. 2026-10-10 23:22 UTCEG score recompute
  75. 2026-10-10 23:22 UTCVendor advisory

Publicly available exploits

(2 references)

Public exploit code is referenced for this CVE (1 Exploit-DB entry, 1 GitHub PoC). Defenders should treat patch urgency accordingly.

  • Exploit-DBEDB-47752
    Published Dec 7, 2019

    Mozilla FireFox (Windows 10 x64) - Full Chain Client Side Attack

    Open source ↗
  • GitHub PoC0vercl0k/CVE-2019-11708
    Published Sep 29, 2019

    Full exploit chain (CVE-2019-11708 & CVE-2019-9810) against Firefox on Windows 64-bit.

    Open source ↗

Frequently asked(6)

What is CVE-2019-11708?
CVE-2019-11708 is a critical-severity vulnerability; its CVE record was published on July 23, 2019. Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxed parent process opening web content chosen by a compromised child process. When combined with additional vulnerabilities this could result in executing…
When was the CVE record for CVE-2019-11708 published?
The CVE record for CVE-2019-11708 was published on July 23, 2019. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 27, 2025; the record at its source may have been updated since.
Is CVE-2019-11708 actively exploited?
Yes. CISA added CVE-2019-11708 to the Known Exploited Vulnerabilities catalog on May 23, 2022, affecting Mozilla Firefox and Thunderbird. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is available. Apply it.
What is the CVSS score of CVE-2019-11708?
CVE-2019-11708 has a CVSS v3 base score of 10.0 (NVD).
Which products are affected by CVE-2019-11708?
CVE-2019-11708 affects Mozilla Firefox and Thunderbird. The affected packages EchelonGraph has on record, with version ranges, are listed in the Affected Packages section of this page.
How do I remediate CVE-2019-11708?
A fix for CVE-2019-11708 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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