CVE-2021-24918

Name: CVE-2021-24918
Creator: NVD / NIST
Published: 2021-11-29T09:15:08.027+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2021-24918 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. The Smash Balloon Social Post Feed WordPress plugin before 4.0.1 did not have any privilege or nonce validation before saving the plugin's setting. As a result, any logged-in user on a vulnerable site could update the settings and store rogue JavaScript on each of its posts and pages.. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

The Smash Balloon Social Post Feed WordPress plugin before 4.0.1 did not have any privilege or nonce validation before saving the plugin's setting. As a result, any logged-in user on a vulnerable site could update the settings and store rogue JavaScript on each of its posts and pages.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.65%

46.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Smashballoon	Smash Balloon Social Post Feed	< 4.0.1

References

https://jetpack.com/2021/10/29/security-issues-patched-in-smash-balloon-social-post-feed-plugin/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/5d252ad7-bf28-44f3-8cd0-c4fe05c48f35Third Party Advisory
https://jetpack.com/2021/10/29/security-issues-patched-in-smash-balloon-social-post-feed-plugin/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/5d252ad7-bf28-44f3-8cd0-c4fe05c48f35Third Party Advisory

Timeline

Published: Nov 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24918?

How severe is CVE-2021-24918?

CVE-2021-24918 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24918?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24918?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST