Is CVE-2020-21662 actively exploited?

No active exploitation of CVE-2020-21662 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-21662 be exploited remotely?

Yes. CVE-2020-21662 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-21662?

CVE-2020-21662 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2020-21662

CWE-89Published: July 31, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

SQL injection vulnerability in yunyecms 2.0.2 allows remote attackers to run arbitrary SQL commands via XFF.

NVD Source

Risk Analysis

Yunyecms is vulnerable to SQL injection via XFF headers, allowing remote attackers to execute arbitrary SQL commands. This critical flaw poses a significant risk to the underlying database.

No public exploit is known, and the vulnerability is not in CISA KEV. It is remotely exploitable with low attack complexity.

Recommended Action

Upgrade to a patched version of Yunyecms or implement strict input validation for HTTP headers.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2020-21662 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-89): SQL injection vulnerabilities allow attackers to manipulate database queries, potentially exposing or modifying sensitive data.