6.5

CVE-2025-3028: mozilla firefox Use After Free

CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-3028DEBIAN-CVE-2025-3028CGA-5738-frjr-rcfx
Published 01-04-2025Last modified 13-04-2026
Open JSON

Vulnerability summary

CVE-2025-3028 is a medium (CVSS 6.5) Use After Free vulnerability in mozilla firefox. EPSS estimates a 0.87% chance of exploitation in the next 30 days, higher than 58.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.87%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 34 · Related 8
DLA-4109-1DLA-4110-1DSA-5889-1DSA-5891-1MGASA-2025-0125MGASA-2025-0126

Timeline

  1. 01-04-2025
    PublishedVulnerability first disclosed.
  2. 13-04-2026
    Last modifiedVulnerability information updated.

Description

JavaScript code running while transforming a document with the XSLTProcessor could lead to a use-after-free. This vulnerability was fixed in Firefox 137, Firefox ESR 115.22, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.87%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

+0.01 pp

From 0.85% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.87%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.mozilla.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Ubuntu8 products
  • mozjs102All versions (No fix recorded)
  • mozjs115All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Chainguard2 products
  • firefox< 128.9-r0
  • firefox-esr< 115.22-r0
Debian2 products
  • firefox-esr< 128.9.0esr-1~deb12u1 | < 128.9.0esr-1
  • thunderbird< 1:128.9.0esr-1~deb12u1 | < 1:128.9.0esr-1
Mozilla2 products
  • firefox< 115.22.0 | < 137.0 | ≥ 116.0, < 128.9.0
  • thunderbird< 128.9.0 | ≥ 129.0, ≤ 137.0
Opensuse1 product
  • mozjs128&distro=openSUSE Tumbleweed< 128.9.0-1.1
Wolfi1 product
  • firefox< 128.9-r0

6 vendors · 16 products

References

16 links
Show all 16 references