CVE-2026-50765Public exploitNetwork attack vector

Stored script execution via unneutralized restriction label

Published Jun 26, 2026 · Updated Jun 26, 2026

Stored XSS in Koha Library Management System 25.11 and earlier allows remote authenticated users to execute scripts in a victim's browser. The patron restriction type administration page stores the display_text label without neutralizing script content and later renders it as active page markup. Administrator privileges are required to submit the label, and execution occurs when another user views the affected page.

CVSS severity6.1
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Koha Library Management System 25.11 and earlier allows remote authenticated users to execute scripts in a victim's browser. The patron restriction type administration page stores the display_text label without neutralizing script content and later renders it as active page markup. Administrator privileges are required to submit the label, and execution occurs when another user views the affected page.

The record

CVE
CVE-2026-50765
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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