CVE-2026-54740Medium· 6.5▾ SunlitLemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-alpha.18, a lower-ranked remote moderator can remove a higher-ranked moderator by sending a signed ActivityPub Remove activity to the target instance. The…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Sep 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
0.3% → 0.4%
Lemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-alpha.18, a lower-ranked remote moderator can remove a higher-ranked moderator by sending a signed ActivityPub Remove activity to the target instance. The local API uses LocalUser::is_higher_mod_or_admin_check to enforce moderator rank, but CollectionRemove::verify in crates/apub/activities/src/community/collection_remove.rs only calls verify_mod_action. CollectionRemove::receive dereferences self.object as an ApubPerson, creates a CommunityModeratorForm, and calls CommunityActions::leave without checking that the actor outranks the moderator identified by the object field. In communities with federated moderators, a junior moderator can therefore strip senior moderators from the community moderator list even though the local API rejects the same action. This issue is fixed in versions 0.19.19 and 1.0.0-alpha.18.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2024-0829Medium· 4.3The Comments Extra Fields For Post,Pages and CPT plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 5.0
CVE-2026-11807Critical· 9.6A missing authorization vulnerability was found in the Event-Driven Ansible (EDA) websocket API
CVE-2025-13772High· 7.1GitLab has remediated an issue in GitLab EE affecting all versions from 18.4 before 18.5.5, 18.6 before 18.6.3, and 18.7 before 18.7.1 that could have allowed an authenticated user to access and utilize AI model settings from unauthorize…
CVE-2025-14486Medium· 5.3The PixelPlay plugin for WordPress is vulnerable to unauthorized API key deletion due to missing authorization checks in all versions up to, and including, 1.0.2
CVE-2025-14484Medium· 5.3The Image Buzz plugin for WordPress is vulnerable to unauthorized API key modification due to missing authorization checks in all versions up to, and including, 1.0.3
CVE-2026-18345Medium· 4.3The WP User Manager plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the Connect::complete() function in versions up to, and including, 2.9.18