What happened
JavaScript code running while transforming a document with the XSLTProcessor could lead to a use-after-free. This vulnerability was fixed in Firefox 137, Firefox ESR 115.22, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.
Affected versions
Firefox: before 115.22.0; before 137.0; 116.0 through before 128.9.0; before 128.9.0; 129.0 through 137.0 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
RepositoryAuthorFirst seenReference
bugzilla.mozilla.orgNVD reference2025-04-01VerifiedSource timeline
CVE record published by NVDView source ↗
Record history
Record created from the first normalized source observation.
Metadata and source references refreshed.