Stored XSS in Koha Library Management System

Publication date: 2026-06-26

Last updated on: 2026-07-05

Assigner: MITRE

Description

A stored cross-site scripting (XSS) vulnerability in the OPAC item detail page of Koha Library Management System 0 through 25.11 versions allow an authenticated remote attacker with edit_items permission to inject arbitrary web scripts via the item public notes field (items.itemnotes).

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-26

Last Modified

2026-07-05

Generated

2026-07-17

AI Q&A

2026-06-27

EPSS Evaluated

2026-07-15

NVD

CVE-2026-50766

EUVD

EUVD-2026-39941

Affected Vendors & Products

Vendor	Product	Version / Range
koha	koha	to 25.11.00 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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.

Attack-Flow Graph

Executive Summary

This vulnerability is a stored cross-site scripting (XSS) issue in the Koha Library Management System, specifically on the OPAC item detail page. It affects versions up to 25.11. An authenticated remote attacker who has the edit_items permission can exploit this vulnerability by injecting arbitrary web scripts into the item public notes field (items.itemnotes). These scripts are then stored and displayed to users, potentially leading to malicious actions.

Impact Analysis

The impact of this vulnerability includes the possibility for an attacker to execute malicious scripts in the context of users viewing the affected item detail page. This can lead to session hijacking, theft of sensitive information, defacement of the website, or other malicious activities that compromise user security and trust.

Hi! I’m here to help you understand CVE-2026-50766. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70