XSS in Wpmanageninja Fluentsmtp

CVE-2021-24528

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-24528: held from 0.006 to 0.006.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

  • Wpmanageninja Fluentsmtp
  • Fluentsmtp – WordPress Mail Smtp, Ses, Sendgrid, Mailgun And Any Smtp Plugin — versions 2.0.1

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-24528?
CVE-2021-24528 is a medium-severity vulnerability in Wpmanageninja Fluentsmtp, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-08-30.
How severe is CVE-2021-24528?
Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2021-24528 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.