CVE-2020-20124Public exploitNetwork attack vector

Authenticated PHP code execution via cache-file injection

Published Sep 28, 2021 · Updated Aug 4, 2024

Static code injection in Wuzhi CMS 4.1.0 allows remote authenticated users to execute PHP code through attachment settings. The attachment administration set() method passes the unfiltered setting value to set_cache(), which writes non-array input verbatim into an executable PHP cache file that get_cache() loads on the next request. A valid back-end session and access to the attachment settings action are required; successful exploitation executes attacker-supplied PHP with the web application process privileges.

CVSS severity8.8
High
EPSS probability2.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Static code injection in Wuzhi CMS 4.1.0 allows remote authenticated users to execute PHP code through attachment settings. The attachment administration set() method passes the unfiltered setting value to set_cache(), which writes non-array input verbatim into an executable PHP cache file that get_cache() loads on the next request. A valid back-end session and access to the attachment settings action are required; successful exploitation executes attacker-supplied PHP with the web application process privileges.

The record

CVE
CVE-2020-20124
Published
Sep 28, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-96, CWE-94, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-96Improper Neutralization of Directives in Statically Saved Code ('Static Code Injection')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

Public exploit references

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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