CVE-2025-8029

Description

Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags. This vulnerability affects Firefox < 141, Firefox ESR < 128.13, Firefox ESR < 140.1, Thunderbird < 141, Thunderbird < 128.13, and Thunderbird < 140.1.

Reserved 2025-07-22 | Published 2025-07-22 | Updated 2025-07-22 | Assigner mozilla

Problem types

javascript: URLs executed on object and embed tags

Product status

Any version before 141
affected

Any version before 128.13
affected

Any version before 140.1
affected

Any version before 141
affected

Any version before 128.13
affected

Any version before 140.1
affected

Credits

Mirko Brodesser

References

bugzilla.mozilla.org/show_bug.cgi?id=1928021

www.mozilla.org/security/advisories/mfsa2025-56/

www.mozilla.org/security/advisories/mfsa2025-58/

www.mozilla.org/security/advisories/mfsa2025-59/

www.mozilla.org/security/advisories/mfsa2025-61/

www.mozilla.org/security/advisories/mfsa2025-62/

www.mozilla.org/security/advisories/mfsa2025-63/

cve.org (CVE-2025-8029)

nvd.nist.gov (CVE-2025-8029)

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