What is CVE-2021-26550?

CVE-2021-26550 is a medium-severity vulnerability in Smartfoxserver, classified under Cleartext Storage of Sensitive Information. CVSS score: 5.5/10. Published 2021-02-09.

How severe is CVE-2021-26550?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Smartfoxserver

CVE-2021-26550

An issue was discovered in SmartFoxServer 2.17.0. Cleartext password disclosure can occur via /config/server.xml.

Published 2021-02-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (28.4th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Smartfoxserver — versions 2.17.0

Weakness classification (CWE)

CWE-312 — Cleartext Storage of Sensitive Information

References

www.zeroscience.mk/en/vulnerabilities/ (Exploit, Third Party Advisory)
www.smartfoxserver.com/ (Product)
packetstormsecurity.com/files/161337/SmartFoxServer-2X-2.17.0-Credential-Disclo… (Exploit, VDB Entry, Third Party Advisory)
www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5627.php (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-26550?: CVE-2021-26550 is a medium-severity vulnerability in Smartfoxserver, classified under Cleartext Storage of Sensitive Information. CVSS score: 5.5/10. Published 2021-02-09.
How severe is CVE-2021-26550?: Medium severity. CVSS v3 base score is 5.5 out of 10.