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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Koha Community Koha affected
Version Status Constraints
26.05.0 affected < 26.05.02
25.11.0 affected < 25.11.07
25.05.0 affected < 25.05.13

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://koha-community.org/koha-25-05-13-released/ cve-icon cve-icon
https://koha-community.org/koha-25-11-07-released/ cve-icon cve-icon
https://koha-community.org/koha-26-05-02-released/ cve-icon cve-icon
https://www.vulncheck.com/advisories/koha-stored-xss-via-purchase-suggestion-handler cve-icon cve-icon
History

Tue, 18 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Koha Stored XSS via Purchase Suggestion Handler
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-18T21:09:48.910Z

Reserved: 2026-04-22T18:50:43.619Z

Link: CVE-2026-41921

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-18T21:16:34.487

Modified: 2026-08-18T21:16:34.487

Link: CVE-2026-41921

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses