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Vulnerability record · CVE-2021-24280 · published 14 May 2021

CVE-2021-24280: Querysol redirection for contact form 7 deserialization of untrusted data vulnerability

Querysol · Redirection For Contact Form 7

In the Redirection for Contact Form 7 WordPress plugin before 2.3.4, any authenticated user, such as a subscriber, could use the import_from_debug AJAX action to inject PHP objects.

8.8 CVSS 3.1 High EPSS 2.0% · top 20.4% CWE-502 · Deserialization of untrusted data
8.8CVSS 3.1 base score, v2 6.5
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

In the Redirection for Contact Form 7 WordPress plugin before 2.3.4, any authenticated user, such as a subscriber, could use the import_from_debug AJAX action to inject PHP objects.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://wpscan.com/vulnerability/db4ba6b0-887e-4ec1-8935-ab21d369b329 ExploitVendor Advisory
https://www.wordfence.com/blog/2021/04/severe-vulnerabilities-patched-in-redirection-for-contact-form-7-plugin/ ExploitVendor Advisory
https://wpscan.com/vulnerability/db4ba6b0-887e-4ec1-8935-ab21d369b329 ExploitVendor Advisory
https://www.wordfence.com/blog/2021/04/severe-vulnerabilities-patched-in-redirection-for-contact-form-7-plugin/ ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-24280), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.