CVE-2026-116208
YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPosts
YesWiki from 4.6.2 before 4.7.0 contains a missing authorization vulnerability in ActivityPubService::syncActorPosts that lets malicious ActivityPub servers manipulate other actors' mirrored entries. Attackers can serve a poisoned outbox with cross-actor Delete, Update, or Create activities during admin-initiated sync to delete, overwrite, forge, or mass-delete entries.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| yeswiki YesWiki |
≥ 4.6.2; < 4.7.0 (affected, semver) 4.7.0 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.2 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 8.1 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H | CNA: VulnCheck |
| 4.0 / 7.2 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 8.1 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H | NVD: [email protected] |
Exploit evidence
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j
exploit · ADP: CISA-ADP
References
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2jCNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/yeswiki-4.6.2-before-4.7.0-missing-authorization-in-activitypub-syncactorpostsCNA: VulnCheck · third-party-advisory
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2jADP: CISA-ADP · exploit
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j[email protected]
- https://www.vulncheck.com/advisories/yeswiki-4.6.2-before-4.7.0-missing-authorization-in-activitypub-syncactorposts[email protected]
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j134c704f-9b21-4f2e-91b3-4a467353bcc0
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