CVE-2022-22759: mozilla firefox Protection Mechanism Failure
Vulnerability summary
CVE-2022-22759 is a critical (CVSS 9.6) Protection Mechanism Failure vulnerability in mozilla firefox. EPSS estimates a 0.76% chance of exploitation in the next 30 days, higher than 54.3% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 27 · Related 11Timeline
- 22-12-2022PublishedVulnerability first disclosed.
- 16-04-2025Last modifiedVulnerability information updated.
Description
If a document created a sandboxed iframe without <code>allow-scripts</code>, and subsequently appended an element to the iframe's document that e.g. had a JavaScript event handler - the event handler would have run despite the iframe's sandbox. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated9.6CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.6CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- NVDNIST9.6CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS trend
Probability
0.76%
Chance of exploitation in the next 30 days
Percentile
54%
Versus all other CVEs
30-day change
+0.01 pp
From 0.74% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu6 products
- firefox< 97.0+build2-0ubuntu0.18.04.1 | < 97.0+build2-0ubuntu0.20.04.1 | < 97.0+build2-0ubuntu1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
- mozjs78All versions (No fix recorded)
Mozilla3 products
- firefox≥ unspecified, < 97 | < 97.0
- firefox_esr≥ unspecified, < 91.6 | < 91.6
- thunderbird≥ unspecified, < 91.6 | < 91.6
Debian2 products
- firefox-esr< 91.6.0esr-1
- thunderbird< 1:91.6.0-1
3 vendors · 11 products
References
11 links- www.mozilla.org/security/advisories/mfsa2022-05/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2022-04/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2022-06/Vendor Advisory
