CVE-2021-27933

Name: CVE-2021-27933
Creator: NVD / NIST
Published: 2021-04-28T07:15:07.477+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 26.61%

Last modified Jun 17, 2026

CVE-2021-27933 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. pfSense 2.5.0 allows XSS via the services_wol_edit.php Description field.. EPSS estimates a 26.61% chance of exploitation in the next 30 days.

Description

pfSense 2.5.0 allows XSS via the services_wol_edit.php Description field.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

26.61%

97.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Pfsense	Pfsense	2.5.0

References

http://seclists.org/fulldisclosure/2021/Apr/61Exploit, Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/61Exploit, Mailing List, Third Party Advisory

Timeline

Published: Apr 28, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27933?

pfSense 2.5.0 allows XSS via the services_wol_edit.php Description field.

How severe is CVE-2021-27933?

CVE-2021-27933 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 26.61% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27933?

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-2021-27933?

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

Scan your code now

Source: NVD / NIST