CVE-2025-54888 (GCVE-0-2025-54888)
Vulnerability from cvelistv5
Published
2025-08-09 01:31
Modified
2025-08-11 13:48
Severity ?
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CWE
Summary
Fedify is a TypeScript library for building federated server apps powered by ActivityPub. In versions below 1.3.20, 1.4.0-dev.585 through 1.4.12, 1.5.0-dev.636 through 1.5.4, 1.6.0-dev.754 through 1.6.7, 1.7.0-pr.251.885 through 1.7.8 and 1.8.0-dev.909 through 1.8.4, an authentication bypass vulnerability allows any unauthenticated attacker to impersonate any ActivityPub actor by sending forged activities signed with their own keys. Activities are processed before verifying the signing key belongs to the claimed actor, enabling complete actor impersonation across all Fedify instances. This is fixed in versions 1.3.20, 1.4.13, 1.5.5, 1.6.8, 1.7.9 and 1.8.5.
References
Impacted products
Vendor Product Version
fedify-dev fedify Version: < 1.3.20
Version: >= 1.4.0-dev.585, < 1.4.13
Version: >= 1.5.0-dev.636, < 1.5.5
Version: >= 1.6.0-dev.754, < 1.6.8
Version: >= 1.7.0-pr.251.885, < 1.7.9
Version: >= 1.8.0-dev.909, < 1.8.5
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