If a document created a sandboxed iframe without <code>allow-scripts</code>, and subsequently appended an element to the iframe's document…

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.

Scores

EPSS (exploitation in 30 days)

0.78% · top 44% of all CVEs (7 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.6.

Weakness

• Sandboxed iframes could have executed script if the parent appended elements
• CWE-693 Protection Mechanism Failure (opens in a new tab)All about CWE-693 and its CVEs

Affected products

• Mozilla · Firefox

  • affected unspecified – < 97

• Mozilla · Thunderbird

  • affected unspecified – < 91.6

• Mozilla · Firefox ESR

  • affected unspecified – < 91.6

References (4)

• https://www.mozilla.org/security/advisories/mfsa2022-05/ (opens in a new tab)x_transferred
• https://www.mozilla.org/security/advisories/mfsa2022-04/ (opens in a new tab)x_transferred
• https://www.mozilla.org/security/advisories/mfsa2022-06/ (opens in a new tab)x_transferred
• https://bugzilla.mozilla.org/show_bug.cgi?id=1739957 (opens in a new tab)x_transferredexploit

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2022-22759](https://trackcve.app/badge/CVE-2022-22759.svg)](https://trackcve.app/cve/CVE-2022-22759)

Record last updated 16 Apr 2025, 14:36 UTC.