CVE-2021-24528

Name: CVE-2021-24528
Creator: NVD / NIST
Published: 2021-08-30T15:15:07.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.62%

Last modified Jun 17, 2026

CVE-2021-24528 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. The FluentSMTP WordPress plugin before 2.0.1 does not sanitize parameters before storing the settings in the database, nor does the plugin escape the values before outputting them when viewing the SMTP settings set by this plugin, leading to a stored cross site scripting (XSS) vulnerability. Only users with roles capable of managing plugins can modify the plugin's settings.. EPSS estimates a 0.62% chance of exploitation in the next 30 days.

Description

The FluentSMTP WordPress plugin before 2.0.1 does not sanitize parameters before storing the settings in the database, nor does the plugin escape the values before outputting them when viewing the SMTP settings set by this plugin, leading to a stored cross site scripting (XSS) vulnerability. Only users with roles capable of managing plugins can modify the plugin's settings.

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

0.62%

45.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wpmanageninja	Fluentsmtp	< 2.0.1

References

https://wpscan.com/vulnerability/8b8d316b-96b2-4cdc-9da5-c9ea6108a85bExploit, Third Party Advisory
https://wpscan.com/vulnerability/8b8d316b-96b2-4cdc-9da5-c9ea6108a85bExploit, Third Party Advisory

Timeline

Published: Aug 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24528?

How severe is CVE-2021-24528?

CVE-2021-24528 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.62% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24528?

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-2021-24528?

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

Scan your code now

Source: NVD / NIST