CVE-2023-52199: Automattic Activitypub

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Missing Authorization vulnerability in Matthias Pfefferle & Automattic ActivityPub.This issue affects ActivityPub: from n/a through 1.0.5.

Affected products

• Automattic Activitypub: up to and including 1.0.5
• Matthias Pfefferle & Automattic Activitypub: up to and including 1.0.5

Published 2024-06-11. Last modified 2026-06-17.