CVE-2022-4562: Meks Flexible Shortcodes < 1.3.5 - Contributor+ Stored XSS

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-02-13 · updated 2026-06-17

Description

The Meks Flexible Shortcodes WordPress plugin before 1.3.5 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admins.

Affected products

Meks Flexible Shortcodes: before 1.3.5 — fixed in 1.3.5

How to fix

Upgrade to a fixed version: Meks Flexible Shortcodes 1.3.5. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/2013d79b-e9f6-4a5a-b421-e840a3bae063
https://wpscan.com/vulnerability/2013d79b-e9f6-4a5a-b421-e840a3bae063

Get alerted when CVE-2022-4562 or the next vulnerability affects your stack