CVE-2026-54806criticalCWE-502

CVE-2026-54806: critical vulnerability in Melapress WP Activity Log

WordPress WP Activity Log plugin <= 5.6.3.1 - PHP Object Injection vulnerability

Published

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48Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 9.8epss 0.7%
from disclosure to weapon5 days
Published on NVDJun 17
1st PoC+5d
Unauthenticated PHP Object Injection in WP Activity Log <= 5.6.3.1 versions.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Melapress · WP Activity Log
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Melapress WP Activity Log

In the same product, most dangerous first.

CVE-2025-0767MEDIUMWP Activity Log 5.3.2 - Insecure deserializationEPSS 0.5%CVE-2023-50905HIGHWordPress WP Activity Log Plugin <= 4.6.1 is vulnerable to Cross Site Scripting (XSS)EPSS 0.3%CVE-2026-62085HIGHWordPress WP Activity Log plugin <= 5.6.6 - SQL Injection vulnerabilityEPSS 0.3%CVE-2026-56005HIGHWordPress WP Activity Log plugin <= 5.6.3.1 - Cross Site Scripting (XSS) vulnerabilityEPSS 0.3%CVE-2026-45435MEDIUMWordPress WP Activity Log plugin <= 5.6.3 - Cross Site Scripting (XSS) vulnerabilityEPSS 0.2%CVE-2026-25331MEDIUMWordPress WP Activity Log plugin <= 5.5.4 - Cross Site Scripting (XSS) vulnerabilityEPSS 0.2%