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.

PUBLISHED Reserved 2025-05-27 | Published 2025-05-27 | Updated 2026-04-13 | Assigner mozilla

Product status

Credits

Satoki Tsuji

References

bugzilla.mozilla.org/show_bug.cgi?id=1920348

www.mozilla.org/security/advisories/mfsa2025-42/

www.mozilla.org/security/advisories/mfsa2025-45/

cve.org (CVE-2025-5271)

nvd.nist.gov (CVE-2025-5271)

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