CVE-2021-24508: Smash Balloon Social Post Feed < 2.19.2 - Unauthenticated Stored XSS

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-09-13 · updated 2026-06-17
Weakness: CWE-79

Description

The Smash Balloon Social Post Feed WordPress plugin before 2.19.2 does not sanitise or escape the feedID POST parameter in its feed_locator AJAX action (available to both authenticated and unauthenticated users) before outputting a truncated version of it in the admin dashboard, leading to an unauthenticated Stored Cross-Site Scripting issue which will be executed in the context of a logged in administrator.

Affected products

Smash Balloon Social Post Feed: before 2.19.2 — fixed in 2.19.2

How to fix

Upgrade to a fixed version: Smash Balloon Social Post Feed 2.19.2. Check the vendor advisory for mitigations.

References

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