CVE-2026-4338 ActivityPub Routing < 8.0.2 - Unauthenticated Drafts/Scheduled/Pending Posts Disclosure
Unauthenticated attackers can access drafts, scheduled, and pending posts in the ActivityPub WordPress plugin due to improper filtering.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4338?
CVE-2026-4338 is a high-severity vulnerability in Unknown ActivityPub, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The ActivityPub WordPress plugin before 8.0.2 does not properly filter posts to be displayed, allowed unauthenticated users to access drafts/scheduled/pending posts
Which versions are affected by CVE-2026-4338?
It affects 1 product.
Products include Automattic Activitypub.
How do I fix CVE-2026-4338?
No fix has been published for CVE-2026-4338 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4338 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4338 exists.
Other vulnerabilities in Unknown ActivityPub
- CVE-2023-3746 ActivityPub for WordPress < 1.0.1 - Contributor+ Stored XSS
- CVE-2023-5057 ActivityPub for WordPress < 1.0.0 - Contributor+ Stored XSS
- CVE-2023-3706 ActivityPub for WordPress < 1.0.0 - Subscriber+ Arbitrary Post Title Disclosure
- CVE-2023-3707 ActivityPub for WordPress < 1.0.0 - Subscriber+ Arbitrary Post Content Disclosure
Sources
Also known as GHSA-v6vj-m59r-f4gf.