Executive brief
WP Activity Log is a popular WordPress plugin used to track and audit user activity on a website. A security vulnerability in this plugin allows attackers to inject malicious scripts into the site, which could lead to unauthorized actions being performed in the browser of an administrative user. This could result in site defacement, redirection to malicious websites, or the theft of sensitive session information.
Technical details
A Cross-Site Scripting (XSS) vulnerability exists in the WP Activity Log plugin for WordPress (versions 5.6.3.1 and earlier) due to improper neutralization of input during web page generation (CWE-79). The vulnerability can be triggered by a user with 'Subscriber' level privileges or higher, though the CVSS vector suggests it may be reachable without authentication under certain conditions (AV:N/PR:N). Successful exploitation requires a victim (typically an administrator) to interact with a malicious link or view a specific page within the WordPress dashboard. This allows the attacker to execute arbitrary JavaScript, potentially leading to session hijacking or unauthorized configuration changes. The issue is resolved in version 5.6.4.
Affected products
- Melapress WP Activity Log <= 5.6.3.1
Timeline
- 2026-05-25: other: Vulnerability reported by researcher daroo
- 2026-06-19: advisory: Patchstack advisory published
- 2026-06-25: disclosed: NVD publication date
- 2026-06-25: patched: Patch confirmed available in version 5.6.4