Koha Community up to 25.05.12/25.11.6/26.05.1 Purchase Suggestion cross site scripting

Summaryinfo

A vulnerability was found in Koha Community Koha up to 25.05.12/25.11.6/26.05.1. It has been rated as problematic. The affected element is an unknown function of the component Purchase Suggestion Handler. This manipulation causes cross site scripting. This vulnerability is registered as CVE-2026-41921. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in Koha Community Koha up to 25.05.12/25.11.6/26.05.1 and classified as problematic. Affected by this vulnerability is an unknown function of the component Purchase Suggestion Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

Koha before 26.05.02, 25.11.07, and 25.05.13 contains a stored cross-site scripting vulnerability in the purchase suggestion handler that allows authenticated staff users to inject malicious scripts by submitting unsanitized input through the suggestion save operation. Attackers can supply crafted HTML or script content in fields such as title, author, isbn, publishercode, place, collectiontitle, itemtype, and note, which are stored without sanitization and later rendered in the suggestion list template, causing injected scripts to execute in the browser of any staff user who views the suggestions.

It is possible to read the advisory at koha-community.org. This vulnerability is known as CVE-2026-41921 since 04/22/2026. The exploitation appears to be easy. The attack can be launched remotely. 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.

Upgrading to version 25.05.13, 25.11.07 or 26.05.02 eliminates this vulnerability.

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Productinfo

Vendor

• Koha Community

Name

• Koha

Version

• 25.05.0
• 25.05.1
• 25.05.2
• 25.05.3
• 25.05.4
• 25.05.5
• 25.05.6
• 25.05.7
• 25.05.8
• 25.05.9
• 25.05.10
• 25.05.11
• 25.05.12
• 25.11.0
• 25.11.1
• 25.11.2
• 25.11.3
• 25.11.4
• 25.11.5
• 25.11.6
• 26.05.0
• 26.05.1

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CPE 2.2info

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