Medium severity · published Feb 3, 2026
CVE-2026-23794
Apache Syncope: Reflected XSS on Enduser Login
6.8
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Apache Syncope · Apache Software Foundation
3.0 through 3.0.15; 4.0 through 4.0.3 · source: vendor
SY
Syncope · Apache
3.0.0 before 3.0.16; 4.0.0 before 4.0.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23794
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-23794
Mailing List
https://lists.apache.org/thread/7h30ghqdsf3spl3h7gdmscxofrm8ygjo
Mailing List
http://www.openwall.com/lists/oss-security/2026/02/02/1
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