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.
Published 2024-01-16 16:15:09
Updated 2024-01-23 17:32:47
Source WPScan
View at NVD,   CVE.org
Vulnerability category: Cross site scripting (XSS)Cross-site request forgery (CSRF)

Products affected by CVE-2021-24559

Exploit prediction scoring system (EPSS) score for CVE-2021-24559

0.05%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 22 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-24559

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.4
MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
2.3
2.7
NIST 2024-01-23

CWE ids for CVE-2021-24559

References for CVE-2021-24559

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