Textpattern CMS 4.9.0 XML cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in Textpattern CMS 4.9.0. The impacted element is an unknown function of the component XML Handler. Performing a manipulation results in cross site scripting. This vulnerability is known as CVE-2026-32986. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Textpattern CMS 4.9.0. It has been classified as problematic. This affects some unknown functionality of the component XML Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

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.

The weakness was published by indoushka. It is possible to read the advisory at packetstorm.news. This vulnerability is uniquely identified as CVE-2026-32986 since 03/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Content Management System

Vendor

• Textpattern

Name

• CMS

Version

• 4.9.0

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CPE 2.2info

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