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Public proof of conceptFix available

CVE-2020-5724

A public proof of concept exists; no exploitation attested.

  • Published2020-03-30
  • Fixed in1.0.20.22
  • WeaknessCWE-89

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2020-03-3020:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-5724?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-5724?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Grandstream ucm6202 firmwareversion to verify
BranchAffectedFixed in
1.0< 1.0.20.221.0.20.22
Grandstream ucm6204 firmwareversion to verify
BranchAffectedFixed in
1.0< 1.0.20.221.0.20.22
Grandstream ucm6208 firmwareversion to verify
BranchAffectedFixed in
1.0< 1.0.20.221.0.20.22

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Grandstream ucm6202 firmware to 1.0.20.22

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
1 moduleauxiliary/gather/grandstream_ucm62xx_sql_account_guessrank: normalModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-89known since 2026-10-23
  • NVDweakness (CWE)CWE-89read 2026-10-23
  • FIRST EPSSEPSS score12.2 %read 2026-11-02
  • Metasploit FrameworkMetasploit modules1known since 2026-11-01

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2020-03-30
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2020-5724?

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.

Is CVE-2020-5724 actively exploited?

Active exploitation of CVE-2020-5724 has not been confirmed. Its EPSS score was 12.2% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-5724?

CVE-2020-5724 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record