AUGUST 4, 2026
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Case File

CVE-2021-24559

MEDIUM · CVSS 5.4 EPSS 0.22%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2024-01-16 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.4. It affects WordPress. Exploitation may require the attacker to be authenticated.

CVE
CVE-2021-24559
Severity
MEDIUM
CVSS
5.4
EPSS
0.22%
WordPress

Original NVD Description

The Qyrr WordPress plugin before 0.7 does not escape the data-uri of the QR Code when outputting it in a src attribute, allowing for Cross-Site Scripting attacks. Furthermore, the data_uri_to_meta AJAX action, available to all authenticated users, only had a CSRF check in place, with the nonce available to users with a role as low as Contributor allowing any user with such role (and above) to set a malicious data-uri in arbitrary QR Code posts, leading to a Stored Cross-Site Scripting issue.