ActivityPub Routing < 8.0.2 - Unauthenticated Drafts/Scheduled/Pending Posts Disclosure
Priority HIGH 72Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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 it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00364 30th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed ActivityPub (Unknown): 8.0.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | ActivityPub | before 8.0.2 | 8.0.2 | Patch available | CNA |
- ActivityPub VendorUnknown Affected before 8.0.2 Fixed in 8.0.2 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:automattic:activitypub:*:*:*:*:*:wordpress:*:* | before 8.0.2 | Vulnerable | Automattic |
- cpe:2.3:a:automattic:activitypub:*:*:*:*:*:wordpress:*:* Versions before 8.0.2 Vulnerable ·Automattic
Remediation
- Fix · CNA ActivityPub (Unknown) Fixed in 8.0.2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-4338
- 2026-10-03 Alias added: GHSA-v6vj-m59r-f4gf
References
More Automattic Activitypub vulnerabilities
- TI-2023-03499 ActivityPub for WordPress < 1.0.1 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
- TI-2023-03463 ActivityPub for WordPress < 1.0.0 - Subscriber+ Arbitrary Post Content Disclosure CVSS 3.1MEDIUM 4.3
- TI-2023-03462 ActivityPub for WordPress < 1.0.0 - Subscriber+ Arbitrary Post Title Disclosure CVSS 3.1MEDIUM 4.3
- TI-2023-04657 ActivityPub for WordPress < 1.0.0 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
Sources
- CVE-2026-4338 · CVE Program
- CVE-2026-4338 · NVD
- FIRST EPSS
- GHSA-v6vj-m59r-f4gf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences