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CVE-2021-24559

MEDIUM 5.4 CVSS 3.1
Published
January 16, 2024
Last modified
June 17, 2026
NVD status
Modified
Reported by
contact@wpscan.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Unknown Qyrr — Before 0.7
  • patrickposner qyrr — Before 0.7

References

  • wpscan.com https://wpscan.com/vulnerability/65a29976-163a-4bbf-a4e8-590ddc4b83f2/ Exploit, Third Party Advisory
  • nvd.nist.gov Official NVD record