CVE-2013-10051Public exploitNetwork attack vector

Remote PHP code execution via eval injection

Published Aug 1, 2025 · Updated May 15, 2026

Eval injection in InstantCMS 1.6 and earlier allows remote attackers to execute arbitrary PHP code through the search view handler. The handler concatenates the untrusted look parameter into a PHP expression and passes the result to eval(), while the Cmd header carries a base64-encoded payload. An unauthenticated HTTP GET request is sufficient, and successful exploitation executes code with the web server's privileges.

CVSS severity9.3
Critical
EPSS probability1.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Eval injection in InstantCMS 1.6 and earlier allows remote attackers to execute arbitrary PHP code through the search view handler. The handler concatenates the untrusted look parameter into a PHP expression and passes the result to eval(), while the Cmd header carries a base64-encoded payload. An unauthenticated HTTP GET request is sufficient, and successful exploitation executes code with the web server's privileges.

The record

CVE
CVE-2013-10051
Published
Aug 1, 2025
Updated
May 15, 2026
Vendor
InstantCMS Team
Product
InstantCMS
Classifications
CWE-95, CAPEC-137, CAPEC-242, T1190, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

InstantCMS Team · InstantCMSversion=0 <=1.6

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8NVDCVSS: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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
CAPEC-137Parameter Injection
CAPEC-242Code Injection
T1190Exploit Public-Facing Application
T1059Command and Scripting Interpreter

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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