7.3

CVE-2025-1936: mozilla firefox

CVSS: 7.3v3.1HighModified
AliasesUBUNTU-CVE-2025-1936DEBIAN-CVE-2025-1936CGA-pqhv-fr97-x9mx
Published 04-03-2025Last modified 13-04-2026
Open JSON

Vulnerability summary

CVE-2025-1936 is a high (CVSS 7.3) vulnerability in mozilla firefox. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 37.5% of scored vulnerabilities.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.3/10
010
High · v3.1 (CVE.org)
EPSS score
0.45%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 24 · Related 9
DLA-4078-1DLA-4081-1DSA-5874-1DSA-5876-1MGASA-2025-0092MGASA-2025-0093

Timeline

  1. 04-03-2025
    PublishedVulnerability first disclosed.
  2. 13-04-2026
    Last modifiedVulnerability information updated.

Description

jar: URLs retrieve local file content packaged in a ZIP archive. The null and everything after it was ignored when retrieving the content from the archive, but the fake extension after the null was used to determine the type of content. This could have been used to hide code in a web extension disguised as something else like an image. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

+0.01 pp

From 0.44% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu9 products
  • firefox< 136.0+build3-0ubuntu0.20.04.1
  • mozjs102All versions (No fix recorded)
  • mozjs115All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
Chainguard2 products
  • firefox< 136-r0
  • firefox-esr< 136-r0
Debian2 products
  • firefox-esr< 128.8.0esr-1~deb12u1 | < 128.8.0esr-1
  • thunderbird< 1:128.8.0esr-1~deb12u1 | < 1:128.8.0esr-1
Mozilla2 products
Wolfi1 product
  • firefox< 136-r0

5 vendors · 16 products

References

13 links
Show all 13 references