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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Yeswiki Yeswiki
cpe:2.3:a:yeswiki:yeswiki:*:*:*:*:*:*:*:*
|
4.6.2
|
4.7.0
|
References 2
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j
GitHub Security Advisory (GHSA-cr64-h6xp-9g2j)
https://www.vulncheck.com/advisories/yeswiki-4.6.2-before-4.7.0-missing-authori…
VulnCheck Advisory: YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPosts