The Grandstream UCM6200 series before 1.0.20.22 is vulnerable to an SQL injection via the HTTP server's websockify endpoint.

published 2020-03-30 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-26883

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 12.2%; EPSS 12.2% chance of exploitation in 30 days, percentile 96%
public exploits: 1; Metasploit

The Grandstream UCM6200 series before 1.0.20.22 is vulnerable to an SQL injection via the HTTP server's websockify endpoint. A remote unauthenticated attacker can invoke the challenge action with a crafted username and discover user passwords.

Patch / fix

fixed in 3

grandstream ucm6202_firmware 1.0.20.22
grandstream ucm6204_firmware 1.0.20.22
grandstream ucm6208_firmware 1.0.20.22

Timeline

2020-03-30 First public exploit (Metasploit auxiliary/gather/grandstream_ucm62xx_sql_account_guess)
2020-03-30 Published

Exploit prediction

12.16% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit auxiliary/gather/grandstream_ucm62xx_sql_account_guess Grandstream UCM62xx IP PBX WebSocket Blind SQL Injection Credential Dump metasploit auxiliary, normal rank, 2020-03-30
tenable.com https://www.tenable.com/security/research/tra-2020-17 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

n/a Grandstream UCM6200 series

Classification

Weakness

CWE-89 Improper Neutralization of Special Elements used in an SQL Command

References

tenable.com /security/research/tra-2020-17
exploit, third-party-advisory

Sources

CVE List CVE-2020-5724
NVD CVE-2020-5724

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary