8.1

CVE-2025-9180: mozilla firefox Origin Validation Error

CVSS: 8.1v3.1HighModified
AliasesUBUNTU-CVE-2025-9180DEBIAN-CVE-2025-9180CGA-8p7m-mf66-g65g
Published 19-08-2025Last modified 13-04-2026

Vulnerability summary

CVE-2025-9180 is a high (CVSS 8.1) Origin Validation Error vulnerability in mozilla firefox. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.6% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 37 · Related 13

Timeline

  1. 19-08-2025
    PublishedVulnerability first disclosed.
  2. 13-04-2026
    Last modifiedVulnerability information updated.

Description

Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

+0.02 pp

From 0.25% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.27%

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

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< 128.14-r0
  • firefox-esr< 140.2-r0
Debian2 products
  • firefox-esr< 128.14.0esr-1~deb12u1 | < 128.14.0esr-1~deb13u1 | < 128.14.0esr-1
  • thunderbird< 1:128.14.0esr-1~deb12u1 | < 1:128.14.0esr-1~deb13u1 | < 1:128.14.0esr-1
Mozilla2 products
  • firefox< 115.27.0 | < 142.0 | ≥ 128.0, < 128.14.0 | ≥ 140.0, < 140.2.0
  • thunderbird< 128.14.0 | < 142.0 | ≥ 140.0, < 140.2.0
Wolfi1 product
  • firefox< 128.14-r0

5 vendors · 15 products

References

17 links
Show all 17 references