7.1

CVE-2025-4085: mozilla firefox Improper Privilege Management

CVSS: 7.1v3.1HighModified
AliasesUBUNTU-CVE-2025-4085CGA-5r45-q32p-mgg2CGA-pqvv-cq4f-m5vf
Published 29-04-2025Last modified 13-04-2026
Open JSON

Vulnerability summary

CVE-2025-4085 is a high (CVSS 7.1) Improper Privilege Management vulnerability in mozilla firefox. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.3% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.30%
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 2 · Related 4
OPENSUSE-SU-2025:15045-1OPENSUSE-SU-2026:11373-1CGA-W3HV-V5V6-4R6RUSN-7991-1

Timeline

  1. 29-04-2025
    PublishedVulnerability first disclosed.
  2. 13-04-2026
    Last modifiedVulnerability information updated.

Description

An attacker with control over a content process could potentially leverage the privileged UITour actor to leak sensitive information or escalate privileges. This vulnerability was fixed in Firefox 138 and Thunderbird 138.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

+0.01 pp

From 0.29% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.30%

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< 138-r0
  • firefox-esr< 138-r0
Mozilla2 products
Wolfi1 product
  • firefox< 138-r0

4 vendors · 13 products

References

7 links