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Fencer Vulns
medium 6.1

CVE-2025-5770 json

Reflected Cross-Site Scripting (XSS) in Authentication Endpoints of Multiple WSO2 Products

published 2025-11-05 12 mo ago modified 2026-10-18 21 d ago also EUVD-2025-37921

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

A reflected cross-site scripting (XSS) vulnerability exists in the authentication endpoints of multiple WSO2 products due to a lack of output encoding. A malicious actor can inject arbitrary JavaScript payloads into the authentication endpoint, which are reflected back in the response, enabling browser-based attacks.

Exploitation may result in redirection to malicious websites, UI manipulation, or unauthorized data access from the victim’s browser. However, session-related cookies are protected with the httpOnly flag, which mitigates session hijacking via this vector.

Patch / fix

  • WSO2 WSO2 Identity Server 6.0.0.247, 6.1.0.246, 7.0.0.122, 7.1.0.29
  • WSO2 WSO2 API Manager 4.2.0.150, 4.3.0.63, 4.4.0.26, 4.5.0.10
  • WSO2 WSO2 API Control Plane 4.5.0.11

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
12 mo ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

  • WSO2 WSO2 Identity Server
  • WSO2 WSO2 API Manager
  • WSO2 WSO2 API Control Plane

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.