MEDIUMCVSS 6.5

CVE-2025-5271

CVE-2025-5271 updated by NVD

Modified: 2026-10-02
Sources: nvd

Summary

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.

References

https://nvd.nist.gov/vuln/detail/CVE-2025-5271

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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