Apache Syncope: Reflected XSS on Enduser Login
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Syncope | 3.0 – 3.0.15; 4.0 – 4.0.3 | — | No fix listed | CNA |
| — | org.apache.syncope.client.idrepo:syncope-client-idrepo-common-ui (Maven) | 3.0.0 to before 3.0.16 | 3.0.16 | Patch available | GHSA-v84m-gfw5-hm2w |
| — | org.apache.syncope.client.idrepo:syncope-client-idrepo-common-ui (Maven) | 4.0.0 to before 4.0.4 | 4.0.4 | Patch available | GHSA-v84m-gfw5-hm2w |
- Apache Syncope VendorApache Affected 3.0 – 3.0.15; 4.0 – 4.0.3 Fixed in — No fix listed CNA
- org.apache.syncope.client.idrepo:syncope-client-idrepo-common-ui (Maven) Vendor— Affected 3.0.0 to before 3.0.16 Fixed in 3.0.16 Patch available GHSA-v84m-gfw5-hm2w
- org.apache.syncope.client.idrepo:syncope-client-idrepo-common-ui (Maven) Vendor— Affected 4.0.0 to before 4.0.4 Fixed in 4.0.4 Patch available GHSA-v84m-gfw5-hm2w
Remediation
- Fix · GHSA-v84m-gfw5-hm2w org.apache.syncope.client.idrepo:syncope-client-idrepo-common-ui (Maven) Fixed in 3.0.16 Advisory →
- Fix · GHSA-v84m-gfw5-hm2w org.apache.syncope.client.idrepo:syncope-client-idrepo-common-ui (Maven) Fixed in 4.0.4 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-23794
- 2026-10-03 Alias added: GHSA-v84m-gfw5-hm2w
References
More Apache Syncope vulnerabilities
- TI-2025-35632 Apache Syncope: Remote Code Execution by delegated administrators CVSS 3.1HIGH 7.2
- TI-2026-38503 Apache Syncope: Remote Code Execution via Scripted Connector CVSS 3.1CRITICAL 9.8
- TI-2026-45025 Apache Syncope: RCE via Groovy Sandbox bypass CVSS 3.1CRITICAL 9.8
- TI-2026-44406 Apache Syncope: User self-service privilege escalation CVSS 3.1CRITICAL 9.8
- TI-2026-41245 Apache Syncope: SQL injection vulnerability in Audit Events search CVSS 3.1CRITICAL 9.8
- TI-2026-38491 Apache Syncope: Remote Code Execution via Flowable BPMN Groovy ScriptTask CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-23794 · CVE Program
- CVE-2026-23794 · NVD
- FIRST EPSS
- GHSA-v84m-gfw5-hm2w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences