CVE-2026-100175 Postie <= 1.9.87 - Unauthenticated Stored Cross-Site Scripting via Email Body URL Autolink
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-100175?
CVE-2026-100175 is a medium-severity vulnerability in wayneallen-1 Postie, published on 28 Oct 2026.
Official description
The Postie plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Email Body URL Autolink in all versions up to, and including, 1.9.87 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is possible because the ?postie=get-mail endpoint is reachable by unauthenticated users with no capability check, and the email processing path removes WordPress's kses output filters before saving raw markup, allowing the unescaped href attribute value to be stored as post content.
Weakness: CWE-79
Which versions are affected by CVE-2026-100175?
How do I fix CVE-2026-100175?
No fix has been published for CVE-2026-100175 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-100175 being exploited?
There is no known exploitation of CVE-2026-100175 in the wild and no public exploit code.
Sources
Also known as GHSA-37r8-fq3j-qq4r.