Activitypub Vulnerabilities

The ActivityPub plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to 8.0.2 (exclusive). This makes it possible for unauthenticated attackers to extract sensitive user or configuration data.

CVSS:

7.5

Affected:

up to 8.0.2

Fixed in:

8.0.2

Disclosed:

Mar 18, 2026

CVE-2026-4338 on NVD →

The ActivityPub plugin for WordPress is vulnerable to unauthorized access of data due to a unsufficient authorization checks on two REST routes in versions up to, and including, 1.0.5. This makes it possible for unauthenticated attackers to call those endpoints.

CVSS:

5.3

Affected:

up to 1.0.5

Fixed in:

1.0.6

Disclosed:

Jan 5, 2024

CVE-2023-52199 on NVD →

The ActivityPub plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 0.17.0 due to missing validation on a user controlled key. This can allow authenticated attackers, with subscriber-level permissions and above, to expose sensitive post information (e.g., draft and p...

CVSS:

6.5

Affected:

up to 0.17.0

Fixed in:

1.0.0

Disclosed:

Sep 25, 2023

CVE-2023-3707 on NVD →

The ActivityPub plugin for WordPress is vulnerable to Stored Cross-Site Scripting via certain post content in versions up to, and including, 0.17.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbi...

CVSS:

6.4

Affected:

up to 0.17.0

Fixed in:

1.0.0

Disclosed:

Sep 25, 2023

CVE-2023-3746 on NVD →

The ActivityPub plugin for WordPress is vulnerable to Stored Cross-Site Scripting via user metadata in versions up to, and including, 0.17.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary w...

CVSS:

6.4

Affected:

up to 0.17.0

Fixed in:

1.0.0

Disclosed:

Sep 25, 2023

CVE-2023-5057 on NVD →

The ActivityPub plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 0.17.0 due to missing validation on a user controlled key. This can allow authenticated attackers, with subscriber-level permissions and above, to expose potentially sensitive post titles (e.g., draf...

CVSS:

4.3

Affected:

up to 0.17.0

Fixed in:

1.0.0

Disclosed:

Sep 25, 2023

CVE-2023-3706 on NVD →