CVE-2026-4338

Name: CVE-2026-4338
Creator: NVD / NIST
Published: 2026-04-08T07:16:22.4+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2026-4338 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.35%

26.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Automattic	Activitypub	< 8.0.2

References

https://wpscan.com/vulnerability/50f68395-72fc-4f99-8e6d-6aa90cc640b5/Third Party Advisory

Timeline

Published: Apr 8, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-4338?

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 severe is CVE-2026-4338?

CVE-2026-4338 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4338?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4338?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST