CVE-2019-9812

CRITICALNVD 9.39.3
EchelonGraph scoreMEDIUM confidence

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

Score 9.3 from GitHub Security Advisory (severity: MODERATE) published 2022-05-24. NVD baseline CVSS 9.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2019-19174 (ENISA EUVD) · GHSA-jh9w-r6qf-jxc5 (GitHub Security Advisories)Source: ENISA EUVD

9.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.5%CVSS: 9.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Given a compromised sandboxed content process due to a separate vulnerability, it is possible to escape that sandbox by loading accounts.firefox.com in that process and forcing a log-in to a malicious Firefox Sync account. Preference settings that disable the sandbox are then synchronized to the local machine and the compromised browser would restart without the sandbox if a crash is triggered. This vulnerability affects Firefox ESR < 60.9, Firefox ESR < 68.1, and Firefox < 69.

CVSS v3
9.3
EG Score
9.3CRITICALmedium confidence
EG Risk
42
EG Risk 42/100

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)
Severity93% × 45%
Impact severity (EG Severity): CVSS 9.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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.
EPSS PROB
1.5%
EPSS %ILE
74th
KEV
Not listed

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

The EG score (9.3): severity, escalated by confirmed exploitation. This CVE's 9.3 is its impact severity (EG Severity), not escalated.

EG Severity
9.3 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade 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 or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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

Published

January 8, 2020

Last Modified

November 25, 2025

Advisory Details (5)

Auto-updated Sep 15, 2026
Patch available.
Web page

Security vulnerabilities fixed in Firefox ESR 60.9 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2019-27/
Web page

Security vulnerabilities fixed in Firefox ESR 68.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2019-26/
Web page

Security vulnerabilities fixed in Firefox 69 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2019-25/
Web page

1538015 - (CVE-2019-11732) Revisit pref sync in to mitigate sandbox escape vector

https://bugzilla.mozilla.org/show_bug.cgi?id=1538015
Web page

1538008 - (CVE-2019-9812) [ ZDI-CAN-8375] UXSS priv-esc via sync (install arbitrary extensions & set arbitrary preferences)

https://bugzilla.mozilla.org/show_bug.cgi?id=1538008

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntufirefox-mozsymbols (69.0+build2-0ubuntu0.16.04.4) @ xenial2026-11-01ubuntu
redhatfirefox-0:60.9.0-1.el6_102019-09-12redhat
redhatfirefox-0:60.9.0-1.el7_72019-09-12redhat
redhatfirefox-0:68.1.0-1.el8_02019-09-04redhat

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

(7 across 7 ecosystems)
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr60.7.2esr-1 ... 60.9.0esr-1~deb9u1 (8 versions)
  • every version up to 60.9.0esr-1~deb10u1: fixed in 60.9.0esr-1~deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 68.1.0esr-1: fixed in 68.1.0esr-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 68.1.0esr-1: fixed in 68.1.0esr-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 68.1.0esr-1: fixed in 68.1.0esr-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 68.1.0esr-1: fixed in 68.1.0esr-1
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr45.0.1esr-1 ... 60.8.0esr-1~deb9u1 (151 versions)
  • every version up to 60.9.0esr-1~deb8u1: fixed in 60.9.0esr-1~deb8u1
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr45.9.0esr-1 ... 60.9.0esr-1~deb8u2 (115 versions)
  • every version up to 60.9.0esr-1~deb9u1: fixed in 60.9.0esr-1~deb9u1
—

Weakness Classification(1)

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

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 28× in last 7d / 96× 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 257 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 157 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 21:42 UTCEG score recompute
  2. 2026-11-01 21:42 UTCVendor advisory
  3. 2026-11-01 21:42 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub severity MODERATE · GitHub CVSS 9.3
  4. 2026-11-01 16:29 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  5. 2026-10-31 23:40 UTCEG score recompute
  6. 2026-10-31 23:40 UTCVendor advisory
  7. 2026-10-31 23:39 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  8. 2026-10-31 16:28 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  9. 2026-10-31 01:36 UTCEG score recompute
  10. 2026-10-31 01:36 UTCVendor advisory
  11. 2026-10-31 01:36 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  12. 2026-10-30 16:29 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  13. 2026-10-30 03:33 UTCEG score recompute
  14. 2026-10-30 03:33 UTCVendor advisory
  15. 2026-10-30 03:33 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  16. 2026-10-29 16:28 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  17. 2026-10-29 05:30 UTCEG score recompute
  18. 2026-10-29 05:30 UTCVendor advisory
  19. 2026-10-29 05:30 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  20. 2026-10-28 16:27 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  21. 2026-10-28 07:28 UTCEG score recompute
  22. 2026-10-28 07:28 UTCVendor advisory
  23. 2026-10-28 07:28 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  24. 2026-10-27 16:27 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  25. 2026-10-27 09:25 UTCEG score recompute
Show 75 more
  1. 2026-10-27 09:25 UTCVendor advisory
  2. 2026-10-27 09:25 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  3. 2026-10-26 16:27 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  4. 2026-10-26 11:11 UTCVendor advisory
  5. 2026-10-26 11:11 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  6. 2026-10-25 18:55 UTCEG score recompute
  7. 2026-10-25 16:28 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  8. 2026-10-25 13:09 UTCEG score recompute
  9. 2026-10-25 13:09 UTCVendor advisory
  10. 2026-10-25 13:09 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  11. 2026-10-24 16:28 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  12. 2026-10-24 15:05 UTCVendor advisory
  13. 2026-10-24 15:05 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  14. 2026-10-23 17:03 UTCEG score recompute
  15. 2026-10-23 17:03 UTCVendor advisory
  16. 2026-10-23 17:03 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  17. 2026-10-23 16:27 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  18. 2026-10-22 18:59 UTCEG score recompute
  19. 2026-10-22 18:59 UTCVendor advisory
  20. 2026-10-22 18:59 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  21. 2026-10-22 16:28 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  22. 2026-10-21 20:56 UTCEG score recompute
  23. 2026-10-21 20:56 UTCVendor advisory
  24. 2026-10-21 20:56 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  25. 2026-10-21 16:28 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  26. 2026-10-20 22:53 UTCEG score recompute
  27. 2026-10-20 22:53 UTCVendor advisory
  28. 2026-10-20 22:53 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  29. 2026-10-20 16:28 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  30. 2026-10-20 00:50 UTCEG score recompute
  31. 2026-10-20 00:50 UTCVendor advisory
  32. 2026-10-20 00:50 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  33. 2026-10-19 16:27 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  34. 2026-10-18 23:47 UTCEG score recompute
  35. 2026-10-18 23:47 UTCVendor advisory
  36. 2026-10-18 23:47 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  37. 2026-10-18 16:28 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  38. 2026-10-18 09:39 UTCEG score recompute
  39. 2026-10-18 01:36 UTCEG score recompute
  40. 2026-10-18 01:36 UTCVendor advisory
  41. 2026-10-18 01:36 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  42. 2026-10-17 16:28 UTCEPSS rescoreEPSS 1.5% · 74th percentile
  43. 2026-10-17 03:18 UTCEG score recompute
  44. 2026-10-17 03:18 UTCVendor advisory
  45. 2026-10-17 03:18 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  46. 2026-10-16 16:32 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  47. 2026-10-16 05:14 UTCEG score recompute
  48. 2026-10-16 05:14 UTCVendor advisory
  49. 2026-10-16 05:14 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  50. 2026-10-15 16:27 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  51. 2026-10-15 03:41 UTCEG score recompute
  52. 2026-10-15 03:41 UTCVendor advisory
  53. 2026-10-15 03:41 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  54. 2026-10-14 16:28 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  55. 2026-10-13 23:46 UTCEG score recompute
  56. 2026-10-13 23:46 UTCVendor advisory
  57. 2026-10-13 23:46 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  58. 2026-10-13 16:28 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  59. 2026-10-12 19:52 UTCVendor advisory
  60. 2026-10-12 19:51 UTCGHSA enrichmentGHSA-jh9w-r6qf-jxc5 · GitHub CVSS 9.3
  61. 2026-10-12 19:50 UTCEG score recompute
  62. 2026-10-12 16:29 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  63. 2026-10-12 00:14 UTCEG score recompute
  64. 2026-10-11 13:42 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  65. 2026-10-10 19:56 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  66. 2026-10-09 20:03 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  67. 2026-10-08 16:38 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  68. 2026-10-07 23:43 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  69. 2026-10-06 15:13 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  70. 2026-10-05 17:39 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  71. 2026-10-04 23:18 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  72. 2026-10-03 14:22 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  73. 2026-09-30 14:59 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  74. 2026-09-30 10:30 UTCEG score recompute
  75. 2026-09-27 13:40 UTCEPSS rescoreEPSS 1.5% · 73rd percentile

Frequently asked(5)

What is CVE-2019-9812?
CVE-2019-9812 is a critical-severity vulnerability; its CVE record was published on January 8, 2020. Given a compromised sandboxed content process due to a separate vulnerability, it is possible to escape that sandbox by loading accounts.firefox.com in that process and forcing a log-in to a malicious Firefox Sync account. Preference settings that disable the sandbox are then synchronized to the…
When was the CVE record for CVE-2019-9812 published?
The CVE record for CVE-2019-9812 was published on January 8, 2020. 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 November 25, 2025; the record at its source may have been updated since.
Is CVE-2019-9812 actively exploited?
CVE-2019-9812 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.5% probability of exploitation in the next 30 days (74th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2019-9812?
CVE-2019-9812 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2019-9812?
A fix for CVE-2019-9812 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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