CVE-2026-105055 WP Mailster CVE debrief

Who should care

Defenders responsible for WP Mailster installations should assess exposure and prioritize verification of configurations and updates. They should review WP Mailster configurations and update to a fixed version if available. Defenders should also monitor WP Mailster for potential exploitation attempts to detect potential security incidents.

Why it matters

Defenders should prioritize verifying WP Mailster configurations and updating to a fixed version if available due to the potential for exploitation of incorrectly configured access control security levels.

• Verify and correct WP Mailster authorization settings to prevent potential exploitation.
• Update WP Mailster to a fixed version to address the vulnerability.
• Monitor WP Mailster for potential exploitation attempts to detect potential security incidents.

Technical summary

The WP Mailster plugin has a Missing Authorization vulnerability, which allows for Exploiting Incorrectly Configured Access Control Security Levels. This issue affects WP Mailster from n/a through 1.9.0.0. The vulnerability may allow attackers to exploit incorrectly configured access control security levels. Defenders should prioritize verifying WP Mailster configurations and updating to a fixed version if available.

Defensive priority

Defenders should prioritize verifying WP Mailster configurations and updating to a fixed version if available.

Recommended defensive actions

• Verify WP Mailster configurations to ensure proper authorization settings.
• Update WP Mailster to a fixed version if available.
• Monitor WP Mailster for potential exploitation attempts.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability, with a CVSS score of 5.3 and a MEDIUM severity. The CVE record was published on 2026-10-05T09:17:10.583Z and has not been modified since then. The NVD entry provides a detailed assessment of the vulnerability. Defenders should verify WP Mailster configurations and update to a fixed version if available. The vulnerability affects WP Mailster from n/a through 1.9.0.0.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.