CVE-2022-1802: mozilla firefox Prototype Pollution
Vulnerability summary
CVE-2022-1802 is a high (CVSS 8.8) Prototype Pollution vulnerability in mozilla firefox. EPSS estimates a 26.71% chance of exploitation in the next 30 days, higher than 98% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 26 · Related 9Timeline
- 22-12-2022PublishedVulnerability first disclosed.
- 16-04-2025Last modifiedVulnerability information updated.
Description
If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
26.71%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
0.00 pp
From 26.71% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Mozilla4 products
- firefox≥ unspecified, < 100.0.2 | < 100.0.2 | < 100.3.0
- firefox_esr≥ unspecified, < 91.9.1 | < 91.9.1
- firefox for android≥ unspecified, < 100.3.0
- thunderbird≥ unspecified, < 91.9.1 | < 91.9.1
Debian2 products
- firefox-esr< 91.9.1esr-1
- thunderbird< 1:91.10.0-1
Ubuntu2 products
- firefox< 100.0.2+build1-0ubuntu0.18.04.1 | < 100.0.2+build1-0ubuntu0.20.04.1
- thunderbird< 1:91.9.1+build1-0ubuntu0.18.04.1 | < 1:91.9.1+build1-0ubuntu0.20.04.1 | < 1:91.9.1+build1-0ubuntu0.22.04.1
3 vendors · 8 products
References
8 links- www.mozilla.org/security/advisories/mfsa2022-19/Vendor Advisory
