{"affected":[{"defaultStatus":"unaffected","product":"yeswiki","source":"CNA: VulnCheck","vendor":"YesWiki","versions":[{"lessThan":"4.7.0","status":"affected","version":"4.6.2","versionType":"semver"},{"status":"unaffected","version":"4.7.0","versionType":"semver"}]}],"cveId":"CVE-2026-116208","cwes":["CWE-862"],"description":"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.","epss":{"date":"2026-11-03","percentile":0.15386,"score":0.00242},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j"}],"kev":null,"metrics":[{"score":7.2,"severity":"high","source":"CNA: VulnCheck","vector":"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","version":"4.0"},{"score":8.1,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","version":"3.1"},{"score":7.2,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"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","version":"4.0"},{"score":8.1,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","version":"3.1"}],"modifiedAt":1793726277253,"publishedAt":1792934438152,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/yeswiki-4.6.2-before-4.7.0-missing-authorization-in-activitypub-syncactorposts"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/yeswiki-4.6.2-before-4.7.0-missing-authorization-in-activitypub-syncactorposts"},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":[],"url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j"}],"remediation":[],"revision":"c46976798026e023d7f1ac57b42b37dafbbc0edb0606e47fbed7a56a373ead1e","sources":[{"modifiedAt":1793724773151,"name":"CNA: VulnCheck","retrievedAt":1793725802431,"url":"https://www.cve.org/CVERecord?id=CVE-2026-116208"},{"modifiedAt":1793726277253,"name":"NVD","retrievedAt":1793729831350,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116208"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793725833821,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-116208"}],"ssvc":{"assessedAt":1793724760574,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPosts","updatedAt":1793729831350}