CVE-2025-1937

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-03-04. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
41.0%
KEV
Not listed

Published

March 4, 2025

Last Modified

April 13, 2026

References (8)

Patch Availability(21)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntufirefox-mozsymbols (136.0+build3-0ubuntu0.20.04.1) @ focal2026-05-21ubuntu
ubuntuxul-ext-lightning (1:128.12.0+build1-0ubuntu0.22.04.1) @ jammy2026-05-21ubuntu
redhatthunderbird-0:128.8.0-2.el8_62025-03-19redhat
redhatthunderbird-0:128.8.0-2.el9_02025-03-18redhat
redhatthunderbird-0:128.8.0-2.el8_42025-03-18redhat
redhatthunderbird-0:128.8.0-2.el9_42025-03-17redhat
redhatthunderbird-0:128.8.0-2.el9_22025-03-17redhat
redhatthunderbird-0:128.8.0-2.el8_102025-03-17redhat
redhatthunderbird-0:128.8.0-2.el8_22025-03-17redhat
redhatthunderbird-0:128.8.0-2.el9_52025-03-17redhat
redhatthunderbird-0:128.8.0-2.el8_82025-03-17redhat
redhatfirefox-0:128.8.0-1.el8_22025-03-13redhat
redhatfirefox-0:128.8.0-1.el7_92025-03-13redhat
redhatfirefox-0:128.8.0-1.el8_62025-03-10redhat
redhatfirefox-0:128.8.0-1.el8_82025-03-10redhat
redhatfirefox-0:128.8.0-1.el9_02025-03-10redhat
redhatfirefox-0:128.8.0-1.el9_22025-03-10redhat
redhatfirefox-0:128.8.0-1.el9_42025-03-10redhat
redhatfirefox-0:128.8.0-1.el8_42025-03-10redhat
redhatfirefox-0:128.8.0-1.el8_102025-03-06redhat
redhatfirefox-0:128.8.0-1.el9_52025-03-05redhat

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.

Weakness Classification(1)

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

All Vendor Advisories

(21)

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 10× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 121 total refreshes for this CVE.

  1. 2026-07-22 14:07 UTCEPSS rescore
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  21. 2026-06-22 00:56 UTCOSV refresh
  22. 2026-06-21 14:56 UTCEPSS rescore
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  24. 2026-06-21 01:59 UTCEPSS rescore
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  49. 2026-06-04 13:11 UTCEPSS rescore
  50. 2026-06-04 13:11 UTCEPSS rescore
  51. 2026-06-03 17:09 UTCOSV refresh
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Frequently asked(5)

What is CVE-2025-1937?
CVE-2025-1937 is a high vulnerability published on March 4, 2025. Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability…
When was CVE-2025-1937 disclosed?
CVE-2025-1937 was first published in the National Vulnerability Database on March 4, 2025, with the most recent update on April 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-1937 actively exploited?
CVE-2025-1937 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 41.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-1937?
CVE-2025-1937 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2025-1937?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-1937, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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