CVE-2013-10051

CVE-2013-10051 is a critical-severity vulnerability in Instantcms with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-95.

Key facts

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.

Frequently asked questions

What is 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.
How severe is CVE-2013-10051?
CVE-2013-10051 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2013-10051 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-10051?
CVE-2013-10051 affects Instantcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-10051?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2013-10051 have an EU (EUVD) identifier?
Yes. CVE-2013-10051 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2013-7270.
When was CVE-2013-10051 published?
CVE-2013-10051 was published on 2025-08-01 and last updated on 2026-06-16.

References

Affected products (1)

More vulnerabilities in Instantcms

All CVEs affecting Instantcms →

Other CWE-95 (Eval Injection) vulnerabilities

Browse all CWE-95 (Eval Injection) vulnerabilities →