What’s Vulnerable › Vulnerabilities

CVE-2023-3746: ActivityPub for WordPress < 1.0.1 - Contributor+ Stored XSS

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-10-16 · updated 2026-06-17

Description

The ActivityPub WordPress plugin before 1.0.0 does not sanitize and escape some data from post content, which could allow contributor and above role to perform Stored Cross-Site Scripting attacks

Affected products

• ActivityPub: before 1.0.0 — fixed in 1.0.0

How to fix

Upgrade to a fixed version: ActivityPub 1.0.0. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/c15a6032-6495-47a8-828c-37e55ed9665a
• https://wpscan.com/vulnerability/c15a6032-6495-47a8-828c-37e55ed9665a

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