CVE-2017-12677: Identityserver IDENTITYSERVER3

Medium severity, CVSS 6.1. EPSS: 1% chance of exploitation in the next 30 days.

IdentityServer3 2.4.x, 2.5.x, and 2.6.x before 2.6.1 has XSS in an Angular expression on the authorize response page, which might allow remote attackers to obtain sensitive information about the IdentityServer authorization response.

Affected products

• Identityserver IDENTITYSERVER3: version 2.4.0 only; version 2.5.0 only; version 2.5.1 only; version 2.5.2 only; version 2.5.3 only; version 2.6.0 only

Published 2017-08-08. Last modified 2026-06-17.