CVE-2026-116208

YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPosts

State: Published
Severity: 7.2 High
Published: Oct 25, 2026
Updated: Oct 25, 2026
Reserved: Oct 25, 2026

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.

Scores

CVSS	Score	Vector	Source
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	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	VulnCheck

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
yeswikiYesWiki	4.6.2 to before 4.7.0Affected 4.7.0Not affected

References

GitHub Security Advisory (GHSA-cr64-h6xp-9g2j)vendor-advisory
VulnCheck Advisory: YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPoststhird-party-advisory

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