CVE-2021-24561: WP SMS < 5.4.13 - Authenticated Stored Cross-Site Scripting

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-08-23 · updated 2026-06-17
Weakness: CWE-79

Description

The WP SMS WordPress plugin before 5.4.13 does not sanitise the "wp_group_name" parameter before outputting it back in the "Groups" page, leading to an Authenticated Stored Cross-Site Scripting issue

Affected products

VeronaLabs WP SMS: before 5.4.13 — fixed in 5.4.13

How to fix

Upgrade to a fixed version: VeronaLabs WP SMS 5.4.13. Check the vendor advisory for mitigations.

References

https://plugins.trac.wordpress.org/changeset/2570762/wp-sms
https://wpscan.com/vulnerability/5433ef4c-4451-4b6e-992b-69c5eccabf90
https://plugins.trac.wordpress.org/changeset/2570762/wp-sms
https://wpscan.com/vulnerability/5433ef4c-4451-4b6e-992b-69c5eccabf90

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