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CVE-2026-41921— Koha Stored XSS via Purchase Suggestion Handler

Quick assessment

Affected
Koha Community Koha
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Koha是Koha社区开源的一个用于图书馆自动化管理建站系统。 Koha 26.05.02之前版本、25.11.07之前版本和25.05.13之前版本存在跨站脚本漏洞，该漏洞源于购买建议处理器对title、author、isbn、publishercode、place、collectiontitle、itemtype、note等字段的用户输入未进行充分清理和转义，可能导致经过身份验证的员工用户通过建议保存操作提交恶意脚本，并在其他员工用户查看建议列表时执行。

CVSS 5.4 · Medium EPSS 0.30% · P23

Affected Version Matrix 3

VendorProduct Version RangeStatus
Koha Community Koha 26.05.0< 26.05.02 affected
25.11.0< 25.11.07 affected
25.05.0< 25.05.13 affected
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I. Basic Information for CVE-2026-41921

Vulnerability Information
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Vulnerability Title
Koha Stored XSS via Purchase Suggestion Handler
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Koha 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Koha是Koha社区开源的一个用于图书馆自动化管理建站系统。 Koha 26.05.02之前版本、25.11.07之前版本和25.05.13之前版本存在跨站脚本漏洞，该漏洞源于购买建议处理器对title、author、isbn、publishercode、place、collectiontitle、itemtype、note等字段的用户输入未进行充分清理和转义，可能导致经过身份验证的员工用户通过建议保存操作提交恶意脚本，并在其他员工用户查看建议列表时执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Koha Community Koha 26.05.0 ~ 26.05.02 -

II. Public POCs for CVE-2026-41921

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III. Intelligence Information for CVE-2026-41921

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Vendor Advisories for CVE-2026-41921 (1)

Vendor Pages for CVE-2026-41921 (3)

IV. Related Vulnerabilities

Same product: Koha
Same vendor: Koha Community
Same weakness: CWE-79

V. Comments for CVE-2026-41921

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