CVE-2026-49276: CWE-83: Improper Neutralization of Script in Attributes in a Web Page in getkirby kirby
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites using the writer field in any blueprint allowed a scripting link to be included as the target of a link or email link in writer mark components, making the target clickable by the user who entered it and enabling self cross-site scripting in the Panel. This issue is fixed in versions 4.9.4 and 5.4.4.
AI Analysis
Technical Summary
CVE-2026-49276 is an improper neutralization of script in attributes vulnerability (CWE-83) affecting the Kirby content management system. Specifically, versions before 4.9.4 and 5.4.4 allow a scripting link to be set as the target of a link or email link in writer mark components within blueprints. This results in self cross-site scripting in the Kirby Panel, where a user-entered script can be executed when the link is clicked. The vulnerability has a CVSS 4.0 score of 7.4 (high severity).
Potential Impact
An attacker or user who can input data into the writer field can inject scripting links that execute in the context of the Kirby Panel, leading to self XSS. This can potentially allow execution of arbitrary scripts, impacting the security of the Panel interface and possibly leading to session hijacking or other client-side attacks.
Mitigation Recommendations
This vulnerability is fixed in Kirby versions 4.9.4 and 5.4.4. Users should upgrade to at least these versions to remediate the issue. No additional temporary mitigations are specified.
CVE-2026-49276: CWE-83: Improper Neutralization of Script in Attributes in a Web Page in getkirby kirby
Description
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites using the writer field in any blueprint allowed a scripting link to be included as the target of a link or email link in writer mark components, making the target clickable by the user who entered it and enabling self cross-site scripting in the Panel. This issue is fixed in versions 4.9.4 and 5.4.4.
CVSS v4.0
Score 7.4high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-49276 is an improper neutralization of script in attributes vulnerability (CWE-83) affecting the Kirby content management system. Specifically, versions before 4.9.4 and 5.4.4 allow a scripting link to be set as the target of a link or email link in writer mark components within blueprints. This results in self cross-site scripting in the Kirby Panel, where a user-entered script can be executed when the link is clicked. The vulnerability has a CVSS 4.0 score of 7.4 (high severity).
Potential Impact
An attacker or user who can input data into the writer field can inject scripting links that execute in the context of the Kirby Panel, leading to self XSS. This can potentially allow execution of arbitrary scripts, impacting the security of the Panel interface and possibly leading to session hijacking or other client-side attacks.
Mitigation Recommendations
This vulnerability is fixed in Kirby versions 4.9.4 and 5.4.4. Users should upgrade to at least these versions to remediate the issue. No additional temporary mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-28T20:07:58.861Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4ff3f768715ace43ecf638
Added to database: 07/09/2026, 19:18:15 UTC
Last enriched: 07/17/2026, 09:54:02 UTC
Last updated: 08/24/2026, 05:18:06 UTC
Views: 79
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