Quick answers
- Is CVE-2026-111832 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-111832 being exploited in the wild.
- How severe is CVE-2026-111832?
- Critical severity, with a CVSS score of 10, published 21 October 2026.
- Which products and versions are affected?
- WP Mailster up to 1.9.1.0.
- Is there a fix for CVE-2026-111832?
- Yes: fixed in 1.9.2.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-111832 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-111832?
- Check whether you run WP Mailster at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 1.9.2.0
Technical details
An unrestricted file upload vulnerability in WP Mailster allows unauthenticated remote attackers to upload arbitrary files including web shells to the affected server. The vulnerability exists in the plugin's upload handling mechanism, which does not properly validate file types. An attacker can exploit this over the network to gain remote code execution and compromise the hosting server.
Affected products
- WP Mailster WP Mailster up to 1.9.1.0
Timeline
- 2026-10-21: disclosed
- 2026-10-19: patched