How severe is CVE-2020-21725?

CVE-2020-21725 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-21725 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-21725?

CVE-2020-21725 affects Opensns. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-21725?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-21725 published?

CVE-2020-21725 was published on 2021-10-07 and last updated on 2026-06-17.

CVE-2020-21725

CVE-2020-21725 is a critical-severity vulnerability in Opensns with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Opensns
Published: 2021-10-07
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2020-21725?: OpenSNS v6.1.0 contains a blind SQL injection vulnerability in /Controller/ChinaCityController.class.php via the pid parameter.
How severe is CVE-2020-21725?: CVE-2020-21725 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-21725 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-21725?: CVE-2020-21725 affects Opensns. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-21725?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-21725 published?: CVE-2020-21725 was published on 2021-10-07 and last updated on 2026-06-17.

References

https://github.com/CoColizdf/CVE/issues/1

Affected products (1)

cpe:2.3:a:opensns:opensns:6.1.0:*:*:*:*:*:*:*

More vulnerabilities in Opensns

CVE-2020-21726 — Critical (CVSS 9.8): OpenSNS v6.1.0 contains a blind SQL injection vulnerability in /Controller/ChinaCityController.class.php via the cid…
CVE-2019-14266 — High (CVSS 8.8): OpenSNS v6.1.0 allows SQL Injection via the index.php?s=/ucenter/Config/ uid parameter because of the getNeedQueryData…

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