CVE-2013-10051

Name: CVE-2013-10051
Creator: NVD / NIST
Published: 2025-08-01T21:15:27.1+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 1.89%

Last modified Jun 16, 2026

CVE-2013-10051 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. A remote PHP code execution vulnerability exists in InstantCMS version 1.6 and earlier due to unsafe use of eval() within the search view handler. Specifically, user-supplied input passed via the look parameter is concatenated into a PHP expression and executed without proper sanitation. EPSS estimates a 1.89% chance of exploitation in the next 30 days.

Description

A remote PHP code execution vulnerability exists in InstantCMS version 1.6 and earlier due to unsafe use of eval() within the search view handler. Specifically, user-supplied input passed via the look parameter is concatenated into a PHP expression and executed without proper sanitation. A remote attacker can exploit this flaw by sending a crafted HTTP GET request with a base64-encoded payload in the Cmd header, resulting in arbitrary PHP code execution within the context of the web server.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

9.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

1.89%

77.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-95

Affected Software

Vendor	Product	Versions
Instantcms	Instantcms	<= 1.6.0

References

https://packetstorm.news/files/id/122176Third Party Advisory
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/instantcms_exec.rbThird Party Advisory
https://www.exploit-db.com/exploits/26622Exploit
https://www.vulncheck.com/advisories/instantcms-remote-php-code-executionThird Party Advisory
https://www.exploit-db.com/exploits/26622Exploit

Timeline

Published: Aug 1, 2025
Last Modified: Jun 16, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2013-10051?

How severe is CVE-2013-10051?

CVE-2013-10051 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 1.89% probability of exploitation in the next 30 days.

How do I fix CVE-2013-10051?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2013-10051?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST