ActivityPub < 8.0.2 - Unauthenticated Information Epxosure
| CVE | CVE-2026-4338 |
|---|---|
| CVSS | 7.5 (High) |
| Publicly Published | March 18, 2026 |
| Last Updated | April 15, 2026 |
| Researcher |
ryuk (kos0ng)
|
Description
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.
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Vulnerability Details for ActivityPub
| Software Type | Plugin |
|---|---|
| Software Slug | activitypub (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 8.0.2, or a newer patched version |
| Affected Version |
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| Patched Version |
|
Recent vulnerabilities in ActivityPub
| # | Title | CVE ID | CVSS | Researchers | Date |
|---|---|---|---|---|---|
| 1 | ActivityPub <= 1.0.5 - Missing Authorization | CVE-2023-52199 | Rafie Muhammad | January 5, 2024 | |
| 2 | ActivityPub <= 0.17.0 - Authenticated (Subscriber+) Insecure Direct Object Reference to Sensitive Post Content Exposure | CVE-2023-3707 | Erwan LR | September 25, 2023 | |
| 3 | ActivityPub <= 0.17.0 - Authenticated (Subscriber+) Insecure Direct Object Reference to Sensitive Post Title Exposure | CVE-2023-3706 | Erwan LR | September 25, 2023 | |
| 4 | ActivityPub <= 0.17.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Post Content | CVE-2023-3746 | Ben Bidner | September 25, 2023 | |
| 5 | ActivityPub <= 0.17.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via User Metadata | CVE-2023-5057 | Ben Bidner | September 25, 2023 |
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