Rapid7’s 2026 Global Cybersecurity Summit is now available on-demand.Watch sessions.
Rapid7

vulnerability

WordPress Plugin: simply-gallery-block: CVE-2021-24667: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Severity
3
CVSS
(AV:N/AC:M/Au:S/C:N/I:P/A:N)
Published
Aug 23, 2021
Added
May 15, 2025
Modified
May 5, 2026

Description

A stored cross-site scripting vulnerability has been discovered in : Simply Gallery Blocks with Lightbox (Version – 2.2.0 and below). The vulnerability exists in the Lightbox functionality where a user with low privileges is allowed to execute arbitrary script code within the context of the application. This vulnerability is due to insufficient validation of image parameters in meta data.

Solution

simply-gallery-block-plugin-cve-2021-24667
Title
Rapid7 Labs

2026 Global Threat Landscape Report

The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.