CVE-2013-10051

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.

CVSS v4.0

9.3 CRITICALCVSS: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

CVSS v3.1

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

EPSS

1.98% chance of exploitation in the next 30 days, 79th percentile

Published

2025-08-01

Updated

2026-05-15

Proof-of-concept exploits (2)

• https://www.exploit-db.com/exploits/26622
• https://packetstorm.news/files/id/122176

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/unix/webapp/instantcms_exec.rb

References

• CVE Record
• NVD entry

Related

• CVE-2013-10050
• CVE-2013-10052
• CVE-2013-10049
• CVE-2013-10053
• CVE-2013-10048
• CVE-2013-10054