PatchTheCVECVE-2013-10051: A remote PHP code execution vulnerability exists in InstantCMS version 1.6 and earlier due to unsafe use of ev
CVE-2013-10051 is a critical-severity flaw (CVSS 9.8) affecting instantcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 ex
Why this priority
- Critical severity
- Public exploit reference
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 3.1% (top 12%) |
| CISA exploited list | No |
| Weakness | CWE-95 |
| Published | 2025-08-01 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Write-up: raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/
- Write-up: www.exploit-db.com/exploits/26622
- Write-up: www.vulncheck.com/advisories/instantcms-remote-php-code-execution
- Metasploit: InstantCMS 1.6 Remote PHP Code Execution
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2013-10051?
instantcms: upgrade to newer than 1.6.0. Exact commands for each OS are on this page.
Is CVE-2013-10051 being exploited?
CVE-2013-10051 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2013-10051 affect?
CVE-2013-10051 affects instantcms. Severity is critical (CVSS 9.8). 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 ex
How urgent is CVE-2013-10051?
Priority 69/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action
Software pages
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