CVE-2021-24436

MEDIUM NUCLEI

W3 Total Cache < 2.1.4 - Reflected Cross-Site Scripting via Extension Parameter

Title source: llm

Exploitation Summary

CVE-2021-24436 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.

Description

The W3 Total Cache WordPress plugin before 2.1.4 was vulnerable to a reflected Cross-Site Scripting (XSS) security vulnerability within the "extension" parameter in the Extensions dashboard, which is output in an attribute without being escaped first. This could allow an attacker, who can convince an authenticated admin into clicking a link, to run malicious JavaScript within the user's web browser, which could lead to full site compromise.

Nuclei Templates (1)

WordPress W3 Total Cache <2.1.4 - Cross-Site Scripting

MEDIUMVERIFIEDby theamanrawat

References (1)

Core 1

Core References

Exploit, Third Party Advisory x_refsource_confirm

https://wpscan.com/vulnerability/05988ebb-7378-4a3a-9d2d-30f8f58fe9ef

Scores

CVSS v3 6.1

EPSS 0.0191

EPSS Percentile 77.0%

Attack Vector NETWORK

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

Details

CWE

CWE-79

Status published

Products (1)

boldgrid/w3_total_cache < 2.1.4

Published Jul 19, 2021

Tracked Since Feb 18, 2026