Apache Syncope up to 3.0.15/4.0.3 Enduser Login cross site scripting

Summaryinfo

A vulnerability described as problematic has been identified in Apache Syncope up to 3.0.15/4.0.3. This impacts an unknown function of the component Enduser Login. Executing a manipulation can lead to cross site scripting. This vulnerability is handled as CVE-2026-23794. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apache Syncope up to 3.0.15/4.0.3. It has been declared as problematic. This vulnerability affects an unknown code block of the component Enduser Login. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. CVE summarizes:

Reflected XSS in Apache Syncope's Enduser Login page. An attacker that tricks a legitimate user into clicking a malicious link and logging in to Syncope Enduser could steal that user's credentials. This issue affects Apache Syncope: from 3.0 through 3.0.15, from 4.0 through 4.0.3. Users are recommended to upgrade to version 3.0.16 / 4.0.4, which fix this issue.

The advisory is available at lists.apache.org. This vulnerability was named CVE-2026-23794. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/04/2026). This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 3.0.16 or 4.0.4 eliminates this vulnerability.

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Productinfo

Vendor

• Apache

Name

• Syncope

Version

• 3.0.0
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5
• 3.0.6
• 3.0.7
• 3.0.8
• 3.0.9
• 3.0.10
• 3.0.11
• 3.0.12
• 3.0.13
• 3.0.14
• 3.0.15
• 4.0.0
• 4.0.1
• 4.0.2
• 4.0.3

License

• open-source

Website

• Vendor: https://www.apache.org/

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