It was possible to craft an email that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically accessed the link. The configuration to block remote content did not prevent that. Thunderbird has been fixed to no longer allow access to web pages listed in the X-Mozilla-External-Attachment-URL header of an email. This vulnerability was fixed in Thunderbird 128.10.1 and Thunderbird 138.0.1.
CVE-2025-3932
“▲” beside the score: it is higher than NVD's CVSS score.
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-05-14. NVD baseline CVSS 6.5; sources differ by 1.0.
Also known asEUVD-2025-14934 (ENISA EUVD) · GHSA-jfxg-6gv4-f2gh (GitHub Security Advisories)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 6.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 34EG Risk 34/100
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)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.4% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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. - EPSS PROB
- 0.4%
- EPSS %ILE
- 32nd
- 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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-26). 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 every mission impact level.CISA BOD 26-04: 60 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 every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 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 Vulnrichment) · Technical impact partial (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
Published
May 14, 2025
Last Modified
April 13, 2026
References (4)
- security@mozillahttps://bugzilla.mozilla.org/show_bug.cgi?id=1960412Permissions Required
- security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-34/Vendor Advisory
- security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-35/Vendor Advisory
- CVE Programhttps://lists.debian.org/debian-lts-announce/2025/05/msg00022.html
Vendor Advisories for CVE-2025-3932(10)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2025:8784Red Hat Product SecurityHigh
Red Hat Security Advisory: thunderbird security update
- RHSA-2025:8756Red Hat Product SecurityHigh
Red Hat Security Advisory: thunderbird security update
- RHSA-2025:8594Red Hat Product SecurityHigh
Red Hat Security Advisory: thunderbird security update
- RHSA-2025:8507Red Hat Product SecurityHigh
Red Hat Security Advisory: thunderbird security update
- RHSA-2025:8391Red Hat Product SecurityHigh
Red Hat Security Advisory: thunderbird security update
- RHSA-2025:8325Red Hat Product SecurityHigh
Red Hat Security Advisory: thunderbird security update
- RHSA-2025:8324Red Hat Product SecurityHigh
Red Hat Security Advisory: thunderbird security update
- RHSA-2025:8326Red Hat Product SecurityHigh
Red Hat Security Advisory: thunderbird security update
- +2 more
Patch Availability(11)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | xul-ext-lightning (1:128.12.0+build1-0ubuntu0.22.04.1) @ jammy | 2026-10-27 | ubuntu |
| redhat | thunderbird-0:128.11.0-1.el8_10 | 2025-06-10 | redhat |
| redhat | thunderbird-0:128.10.1-1.el8_8 | 2025-06-10 | redhat |
| redhat | thunderbird-0:128.10.1-1.el8_6 | 2025-06-05 | redhat |
| redhat | thunderbird-0:128.10.1-1.el8_4 | 2025-06-04 | redhat |
| redhat | thunderbird-0:128.10.1-1.el8_2 | 2025-06-02 | redhat |
| redhat | thunderbird-0:128.10.1-1.el9_2 | 2025-05-29 | redhat |
| redhat | thunderbird-0:128.10.1-1.el9_0 | 2025-05-29 | redhat |
| redhat | thunderbird-0:128.10.1-1.el9_4 | 2025-05-29 | redhat |
| redhat | thunderbird-0:128.10.1-1.el9_6 | 2025-05-27 | redhat |
| redhat | thunderbird-0:128.10.1-1.el10_0 | 2025-05-27 | redhat |
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
(4 across 4 ecosystems)
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| thunderbird | 1:102.0.1-1 ... 1:91.9.0-1~deb9u1 (250 versions) |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| thunderbird | 1:102.11.0-1 ... 1:128.9.0esr-1~deb12u1 (135 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| thunderbird | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| thunderbird | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(1)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 10× in last 7d / 42× 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 98 of 225 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 127 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-27 12:17 UTCEG score recompute
- 2026-10-27 12:17 UTCVendor advisory
- 2026-10-27 12:17 UTCGHSA enrichmentGHSA-jfxg-6gv4-f2gh · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-25 16:29 UTCEG score recompute
- 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-18 16:24 UTCVendor advisory
- 2026-10-18 16:24 UTCGHSA enrichmentGHSA-jfxg-6gv4-f2gh · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-18 05:35 UTCEG score recompute
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-16 16:38 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.4% · 31st percentile
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- 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-13 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-10-12 17:07 UTCEG score recompute
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-10-11 20:39 UTCEG score recompute
- 2026-10-11 18:50 UTCEG score recompute
- 2026-10-11 15:27 UTCEG score recompute
- 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-08 17:09 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-10-06 19:44 UTCOSV refresh
- 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-26 00:24 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-09-17 19:29 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-17 01:06 UTCOSV refresh
- 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-29 01:13 UTCOSV refresh
- 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
- 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-08-12 13:15 UTCOSV refresh
- 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.3% · 27th percentile
- 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.3% · 25th percentile
- 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
- 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.3% · 25th percentile
- 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile
- 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.3% · 25th percentile
- 2026-07-30 01:29 UTCEPSS rescoreEPSS 0.3% · 25th percentile
- 2026-07-28 15:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
Related CVEs(same vendor + same CWE)
Same vendor
10 shownredhat:RHSA-2025:8196 · redhat:RHSA-2025:8756
Frequently asked(5)
What is CVE-2025-3932?
When was the CVE record for CVE-2025-3932 published?
Is CVE-2025-3932 actively exploited?
What is the CVSS score of CVE-2025-3932?
How do I remediate CVE-2025-3932?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-3932
Is Your Infrastructure Affected by CVE-2025-3932?
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