CVE-2020-21662Network attack vector

Arbitrary SQL execution via unneutralized XFF header

Published Jul 31, 2023 · Updated Oct 22, 2024

SQL injection in yunyecms 2.0.2 allows remote attackers to execute arbitrary SQL commands through a crafted X-Forwarded-For header. The request-metadata handling path passes the attacker-controlled XFF value into an SQL statement without adequate neutralization; public materials do not identify the affected file or function. No authentication or user interaction is required; successful exploitation grants the SQL privileges held by the application's database account.

CVSS severity9.8
Critical
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in yunyecms 2.0.2 allows remote attackers to execute arbitrary SQL commands through a crafted X-Forwarded-For header. The request-metadata handling path passes the attacker-controlled XFF value into an SQL statement without adequate neutralization; public materials do not identify the affected file or function. No authentication or user interaction is required; successful exploitation grants the SQL privileges held by the application's database account.

The record

CVE
CVE-2020-21662
Published
Jul 31, 2023
Updated
Oct 22, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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