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Vulnerability record · CVE-2021-24943 · published 6 December 2021

CVE-2021-24943: Roundupwp registrations for the events calendar sql injection vulnerability

Roundupwp · Registrations For The Events Calendar

The Registrations for the Events Calendar WordPress plugin before 2.7.6 does not sanitise and escape the event_id in the rtec_send_unregister_link AJAX action (available to both unauthenticated and authenticated users) before using it in a SQL statement, leading to an unauthenticated SQL injection.

9.8 CVSS 3.1 Critical EPSS 7.5% · top 5.7% CWE-89 · SQL injection
9.8CVSS 3.1 base score, v2 7.5
7.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The Registrations for the Events Calendar WordPress plugin before 2.7.6 does not sanitise and escape the event_id in the rtec_send_unregister_link AJAX action (available to both unauthenticated and authenticated users) before using it in a SQL statement, leading to an unauthenticated SQL injection.

CVSS:3.1/AV:N/AC:L/PR:N/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/ba50c590-42ee-4523-8aa0-87ac644b77ed ExploitThird Party Advisory
https://wpscan.com/vulnerability/ba50c590-42ee-4523-8aa0-87ac644b77ed ExploitThird Party Advisory

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Related vulnerabilities

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

9.6CVE-2024-7982Roundupwp registrations for the events calendar cross-site scripting vulnerabilityThe Registrations for the Events Calendar WordPress plugin before 2.12.4 does not sanitise and escape some parameters when accepting event registrati…EPSS 0.69%8.8CVE-2024-39638Roundupwp registrations for the events calendar sql injection vulnerabilityImproper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Roundup WP Registrations for the Events Calenda…EPSS 0.44%6.1CVE-2024-10703Roundupwp registrations for the events calendar cross-site scripting vulnerabilityThe Registrations for the Events Calendar WordPress plugin before 2.13.4 does not sanitise and escape some of its settings, which could allow high pr…EPSS 0.27%6.1CVE-2021-25083Roundupwp registrations for the events calendar cross-site scripting vulnerabilityThe Registrations for the Events Calendar WordPress plugin before 2.7.10 does not escape the qtype parameter before outputting it back in an attribut…EPSS 0.89%6.1CVE-2021-24876Roundupwp registrations for the events calendar cross-site scripting vulnerabilityThe Registrations for the Events Calendar WordPress plugin before 2.7.5 does not escape the v parameter before outputting it back in an attribute, le…EPSS 1.2%9.8CVE-2026-76461Cisco AsyncOS email parsing SQL injection allows root command executionCisco AsyncOS Software for Cisco Secure Email Gateway fails to properly validate email parsing input, allowing crafted email messages containing mali…KEVEPSS 28%analysed9.3CVE-2026-9586Sangoma Switchvox unauthenticated SQL injection in /pa endpointSangoma Switchvox SMB Edition 8.3 (104997) fails to sanitize the PhoneIP value from XML content beginning with <PolycomIPPhone> before concatenating …KEVEPSS 19%analysed10.0CVE-2026-72898Metabase unauthenticated SQL injection in reset_password endpointMetabase exposes a database endpoint, '/reset_password', that fails to neutralize attacker-supplied SQL, allowing arbitrary SQL injection. Because th…KEVEPSS 19%analysed

Source: NIST National Vulnerability Database (record CVE-2021-24943), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.