CVE-2022-28282: mozilla firefox Use After Free
Vulnerability summary
CVE-2022-28282 is a medium (CVSS 6.5) Use After Free vulnerability in mozilla firefox. EPSS estimates a 2.18% chance of exploitation in the next 30 days, higher than 82.3% of scored vulnerabilities. 4 public exploits are recorded.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 26 · Related 10Timeline
- 22-12-2022PublishedVulnerability first disclosed.
- 15-04-2025Last modifiedVulnerability information updated.
Description
By using a link with <code>rel="localization"</code> a use-after-free could have been triggered by destroying an object during JavaScript execution and then referencing the object through a freed pointer, leading to a potential exploitable crash. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.18%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
Increase +0.08 pp
From 2.10% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
4 foundExploit Reference (mozilla.org)
Maturity: unknown
Exploit Reference (mozilla.org)
Maturity: unknown
Exploit Reference (mozilla.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine4 products
- firefox< 99.0-r0
- firefox-esr< 91.8.0-r0
- librewolf< 99.0-r0
- thunderbird< 91.8.0-r0
Mozilla3 products
- firefox≥ unspecified, < 99 | < 99.0
- firefox esr≥ unspecified, < 91.8 | < 91.8
- thunderbird≥ unspecified, < 91.8 | < 91.8
Debian2 products
- firefox-esr< 91.8.0esr-1
- thunderbird< 1:91.8.0-1
Ubuntu2 products
- firefox< 99.0+build2-0ubuntu0.18.04.2 | < 99.0+build2-0ubuntu0.20.04.2 | < 1:1snap1-0ubuntu1
- thunderbird< 1:91.8.1+build1-0ubuntu0.18.04.1 | < 1:91.8.1+build1-0ubuntu0.20.04.1
4 vendors · 11 products
