CVE-2021-26549

Name: CVE-2021-26549
Creator: NVD / NIST
Published: 2021-02-09T20:15:14.707+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.35%

Last modified Jun 17, 2026

CVE-2021-26549 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An XSS issue was discovered in SmartFoxServer 2.17.0. Input passed to the AdminTool console is not properly sanitized before being returned to the user. EPSS estimates a 1.35% chance of exploitation in the next 30 days.

Description

An XSS issue was discovered in SmartFoxServer 2.17.0. Input passed to the AdminTool console is not properly sanitized before being returned to the user. This can be exploited to execute arbitrary HTML code in a user's browser session in context of an affected site.

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

1.35%

67.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Smartfoxserver	Smartfoxserver	2.17.0

References

http://packetstormsecurity.com/files/161335/SmartFoxServer-2X-2.17.0-God-Mode-Console-WebSocket-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://www.smartfoxserver.comProduct
https://www.zeroscience.mk/en/vulnerabilities/Exploit, Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5626.phpExploit, Third Party Advisory
http://packetstormsecurity.com/files/161335/SmartFoxServer-2X-2.17.0-God-Mode-Console-WebSocket-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://www.smartfoxserver.comProduct
https://www.zeroscience.mk/en/vulnerabilities/Exploit, Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5626.phpExploit, Third Party Advisory

Timeline

Published: Feb 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26549?

How severe is CVE-2021-26549?

CVE-2021-26549 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.35% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26549?

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-2021-26549?

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

Scan your code now

Source: NVD / NIST