6.5

CVE-2025-9183: mozilla firefox

CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-9183CGA-fcqj-fmwp-359fCGA-jphx-j9r6-mfgp
Published 19-08-2025Last modified 13-04-2026
Open JSON

Vulnerability summary

CVE-2025-9183 is a medium (CVSS 6.5) vulnerability in mozilla firefox. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.1% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · 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 4 · Related 6
OPENSUSE-SU-2025:15467-1OPENSUSE-SU-2025:15516-1SUSE-SU-2025:03008-1SUSE-SU-2025:03009-1CGA-P539-HQ84-HC89CGA-R7XW-5648-FFF6

Timeline

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

Description

Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 142 and Firefox ESR 140.2.

CVSS metrics

5 scores · 5 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 21-09-2026

21-09-202621-10-2026
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< 140.2-r0
  • firefox-esr< 140.2-r0
Mozilla1 product
Wolfi1 product
  • firefox< 140.2-r0

4 vendors · 12 products

References

6 links