PatchTheCVECVE-2026-4338: The ActivityPub WordPress plugin before 8.0.2 does not properly filter posts to be displayed, allowed unauthen
CVE-2026-4338 is a high-severity flaw (CVSS 7.5) affecting activitypub. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 72%) |
| CISA exploited list | No |
| Published | 2026-04-08 |
| Last modified | 2026-07-24 |
Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-4338?
activitypub: upgrade to 8.0.2. Exact commands for each OS are on this page.
Is CVE-2026-4338 being exploited?
CVE-2026-4338 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-4338 affect?
CVE-2026-4338 affects activitypub. Severity is high (CVSS 7.5). 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
How urgent is CVE-2026-4338?
Priority 38/100. High severity; Remotely exploitable, no login, no user action