CVE-2011-3379
HIGH · CVSS 7.5EPSS 5.0%EU EUVD
The is_a function in PHP 5.3.7 and 5.3.8 triggers a call to the __autoload function, which makes it easier for remote attackers to execute arbitrary code by providing a crafted URL and leveraging potentially unsafe behavior in certain PEAR packages and custom autoloaders.
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-94
- EPSS score
- 5.0% (92th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-3342)
- Published
- November 3, 2011
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-3342 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- php / php
- php / php
References
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
- http://securityreason.com/securityalert/8525
- http://svn.php.net/viewvc/?view=revision&revision=317183(Patch)
- http://www.byte.nl/blog/2011/09/23/security-bug-in-is_a-function-in-php-5-3-7-5-3-8/(Exploit)
- http://www.securityfocus.com/archive/1/519770/30/0/threaded
- https://bugs.php.net/bug.php?id=55475(Exploit)
- https://bugzilla.redhat.com/show_bug.cgi?id=741020(Patch)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain