Is CVE-2021-24878 actively exploited?

Yes. CVE-2021-24878 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-24878 be exploited remotely?

The attack vector of CVE-2021-24878 has not been classified yet.

What is the CVSS score of CVE-2021-24878?

CVE-2021-24878 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-24878

UNKNOWNCISA KEVIN THE WILD

CVE-2021-24878

Published: April 11, 2026

EPSS:0.37%probability of exploitation in 30 daysPercentile:58.7th

Official Description

The SupportCandy WordPress plugin before 2.2.7 does not sanitise and escape the query string before outputting it back in pages with the [wpsc_create_ticket] shortcode embed, leading to a Reflected Cross-Site Scripting issue

NVD Source

Technical Analysis

CVE-2021-24878 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-24878 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.