CVE-2020-21726

Name: CVE-2020-21726
Creator: NVD / NIST
Published: 2021-10-07T22:15:07.4+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.24%

Last modified Jun 17, 2026

CVE-2020-21726 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. OpenSNS v6.1.0 contains a blind SQL injection vulnerability in /Controller/ChinaCityController.class.php via the cid parameter.. EPSS estimates a 1.24% chance of exploitation in the next 30 days.

Description

OpenSNS v6.1.0 contains a blind SQL injection vulnerability in /Controller/ChinaCityController.class.php via the cid parameter.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.24%

65.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions
Opensns	Opensns	6.1.0

References

https://github.com/CoColizdf/CVE/issues/2Exploit, Third Party Advisory
https://github.com/CoColizdf/CVE/issues/2Exploit, Third Party Advisory

Timeline

Published: Oct 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21726?

OpenSNS v6.1.0 contains a blind SQL injection vulnerability in /Controller/ChinaCityController.class.php via the cid parameter.

How severe is CVE-2020-21726?

CVE-2020-21726 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.24% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21726?

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-2020-21726?

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

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Source: NVD / NIST