RADIUS Server vulnerability

Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Synology RADIUS Server allows remote authenticated users with administrator privileges to read or write limited files in SRM and conduct limited denial-of-service via unspecified vectors.

Published 29 Aug 2025Updated 26 Sep 20261 sources
CVSS 5.9

What happened

Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Synology RADIUS Server allows remote authenticated users with administrator privileges to read or write limited files in SRM and conduct limited denial-of-service via unspecified vectors.

Affected versions

RADIUS Server: * through before 3.0.27-0453 (semver); * through before 3.0.27-0516 (semver); * through before 3.0.27-0139 (semver) Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

  • Apply vendor-provided updates or mitigations.
  • Review affected product exposure and access logs.

Public PoC references

No public PoC reference has passed the current publication threshold.