Medium severity6.5NVD Advisory· Published May 27, 2025· Updated Jun 17, 2026
CVE-2025-5271
CVE-2025-5271
Description
Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. This vulnerability was fixed in Firefox 139 and Thunderbird 139.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
8>=139+ 1 more
- (no CPE)range: >=139
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <139.0
- Range: >=139
- osv-coords5 versionspkg:apk/chainguard/firefox-esrpkg:apk/wolfi/firefoxpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:apk/chainguard/firefoxpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed
< 140.5.0-r0+ 4 more
- (no CPE)range: < 140.5.0-r0
- (no CPE)range: < 139-r0
- (no CPE)range: < 139.0.1-1.1
- (no CPE)range: < 139-r0
- (no CPE)range: < 153.0-1.1
Patches
Vulnerability mechanics
References
3- www.mozilla.org/security/advisories/mfsa2025-42/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
- www.mozilla.org/security/advisories/mfsa2025-45/nvd
News mentions
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