CVE-2006-4433
PHP before 4.4.3 and 5.x before 5.1.4 does not limit the character set of the session identifier (PHPSESSID) for third party session handlers, which might make it easier for remote attackers to exploit other vulnerabilities by inserting PHP code into the PHPSESSID, which is stored in the session file. NOTE: it could be argued that this not a vulnerability in PHP itself, rather a design limitation that enables certain attacks against session handlers that do not account for this limitation.
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- EPSS score
- 1.8% (79th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2006-4421)
- Published
- August 29, 2006
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2006-4421 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- php / php
- php / php
- php / php
- php / php
- php / php
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- php / php
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and 15 more…
References
- http://secunia.com/advisories/21573(Patch, Vendor Advisory)
- http://securityreason.com/securityalert/1466
- http://www.hardened-php.net/advisory_052006.128.html(Patch, Vendor Advisory)
- http://www.osvdb.org/28233
- http://www.osvdb.org/28273
- http://www.securityfocus.com/archive/1/444263/100/0/threaded
- http://www.vupen.com/english/advisories/2006/3388
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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