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
Published Aug 29, 2006
7.5
HIGHCVSS 2.0
EPSS 1.82%
Description
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.
Affected products
No data.
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0.0
- 4.0.1
- 4.0.1
- 4.0.1
- 4.0.2
- 4.0.3
- 4.0.3
- 4.0.4
- 4.0.4
- 4.0.5
- 4.0.6
- 4.0.7
- 4.0.7
- 4.0.7
- 4.0.7
- 4.1.0
- 4.1.1
- 4.1.2
- 4.2
- 4.2.0
- 4.2.1
- 4.2.2
- 4.2.3
- 4.3.0
- 4.3.1
- 4.3.2
- 4.3.3
- 4.3.4
- 4.3.5
- 4.3.6
- 4.3.7
- 4.3.8
- 4.3.9
- 4.3.10
- 4.3.11
- 4.4.0
- 4.4.1
- 4.4.2
- 5.0
- 5.0
- 5.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.1
- 5.0.2
- 5.0.3
- 5.0.4
- 5.0.5
- 5.1.0
- 5.1.1
- 5.1.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
We do not consider this to be a PHP flaw. The problem is caused by the insufficient input validation performed by Zend platform.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.82% (0.01825) | 78.05th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.84% (0.01843) | 76.18th | v5 (v2026.06.15) |
| Mar 17, 2025 | 2.28% (0.02283) | 83.53th | v4 (v2025.03.14) |
| Dec 12, 2024 | 3.12% (0.03123) | 91.44th | v3 (v2023.03.01) |
| Oct 24, 2023 | 3.12% (0.03123) | 89.96th | v3 (v2023.03.01) |
| Aug 9, 2023 | 3.34% (0.03344) | 90.08th | v3 (v2023.03.01) |
| Jul 2, 2023 | 3.35% (0.03353) | 90.03th | v3 (v2023.03.01) |
| May 25, 2023 | 3.22% (0.03221) | 89.77th | v3 (v2023.03.01) |
| Apr 17, 2023 | 1.35% (0.01347) | 84.10th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.28% (0.01284) | 83.64th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
No CWE recorded.
References (10)
- http://secunia.com/advisories/21573 third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory
- http://securityreason.com/securityalert/1466 third-party-advisoryx_refsource_SREASON
- http://www.hardened-php.net/advisory_052006.128.html x_refsource_MISCPatchVendor Advisory
- http://www.osvdb.org/28233 vdb-entryx_refsource_OSVDB
- http://www.osvdb.org/28273 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/archive/1/444263/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.vupen.com/english/advisories/2006/3388 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2006-4433 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2006-4433
- https://www.cve.org/CVERecord?id=CVE-2006-4433
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/21573 | third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory | |
| http://securityreason.com/securityalert/1466 | third-party-advisoryx_refsource_SREASON | |
| http://www.hardened-php.net/advisory_052006.128.html | x_refsource_MISCPatchVendor Advisory | |
| http://www.osvdb.org/28233 | vdb-entryx_refsource_OSVDB | |
| http://www.osvdb.org/28273 | vdb-entryx_refsource_OSVDB | |
| http://www.securityfocus.com/archive/1/444263/100/0/threaded | mailing-listx_refsource_BUGTRAQ | |
| http://www.vupen.com/english/advisories/2006/3388 | vdb-entryx_refsource_VUPEN | |
| https://access.redhat.com/security/cve/CVE-2006-4433 | Vendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2006-4433 | ||
| https://www.cve.org/CVERecord?id=CVE-2006-4433 |
Change history (0)
No recorded changes yet.