CVE-2021-24214: OpenID Connect Generic Client 3.8.0-3.8.1 - Reflected Cross Site Scripting (XSS) via Login Error

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-05-06 · updated 2026-06-17
Weakness: CWE-79

Description

The OpenID Connect Generic Client WordPress plugin 3.8.0 and 3.8.1 did not sanitise the login error when output back in the login form, leading to a reflected Cross-Site Scripting issue. This issue does not require authentication and can be exploited with the default configuration.

Affected products

daggerhart OpenID Connect Generic Client: 3.8.0, 3.8.1

References

https://wpscan.com/vulnerability/31cf0dfb-4025-4898-a5f4-fc7115565a10
https://wpscan.com/vulnerability/31cf0dfb-4025-4898-a5f4-fc7115565a10

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