Vulnerability · Published Mar 20, 2026 · Assigned by VulnCheck
CVE-2026-32986Textpattern CMS 4.9.0: Second-Order XSS via Atom Feed Injection
Medium 6.1
In plain English
A medium-severity cross-site scripting in Textpattern CMS from Textpattern. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).
Official description
Textpattern CMS version 4.9.0 contains a second-order cross-site scripting vulnerability that allows attackers to inject malicious scripts by exploiting improper sanitization of user-supplied input in Atom feed XML elements. Attackers can embed unescaped payloads in parameters such as category that are reflected into Atom fields like and , which execute as JavaScript when feed readers or CMS aggregators consume the feed and insert content into the DOM using unsafe methods.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Textpattern | Textpattern CMS | 4.9.0 |
Weakness: CWE-79, CWE-116 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N