php: session fixation vulnerability allows remote hijacking of sessions
Published Aug 13, 2013
6.8
MEDIUMCVSS 2.0
EPSS 3.62%
Description
Session fixation vulnerability in the Sessions subsystem in PHP before 5.5.2 allows remote attackers to hijack web sessions by specifying a session ID.
Affected products
No data.
- ≤ 5.5.1
- 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
- 5.1.3
- 5.1.4
- 5.1.5
- 5.1.6
- 5.2.0
- 5.2.1
- 5.2.2
- 5.2.3
- 5.2.4
- 5.2.5
- 5.2.6
- 5.2.7
- 5.2.8
- 5.2.9
- 5.2.10
- 5.2.11
- 5.2.12
- 5.2.13
- 5.2.14
- 5.2.15
- 5.2.16
- 5.2.17
- 5.3.0
- 5.3.1
- 5.3.2
- 5.3.3
- 5.3.4
- 5.3.5
- 5.3.6
- 5.3.7
- 5.3.8
- 5.3.9
- 5.3.10
- 5.3.11
- 5.3.12
- 5.3.13
- 5.3.14
- 5.3.15
- 5.3.16
- 5.3.17
- 5.3.18
- 5.3.19
- 5.3.20
- 5.3.21
- 5.3.22
- 5.3.23
- 5.3.24
- 5.3.25
- 5.3.26
- 5.3.27
- 5.4.0
- 5.4.1
- 5.4.2
- 5.4.3
- 5.4.4
- 5.4.5
- 5.4.6
- 5.4.7
- 5.4.8
- 5.4.9
- 5.4.10
- 5.4.11
- 5.4.12
- 5.4.12
- 5.4.12
- 5.4.13
- 5.4.13
- 5.4.14
- 5.4.14
- 5.4.15
- 5.4.16
- 5.5.0
- 5.5.0
- 5.5.0
- 5.5.0
- 5.5.0
- 5.5.0
- 5.5.0
- 5.5.0
- 5.5.0
- 5.5.0
- 5.5.0
- 5.5.0
No data.
Red Hat Enterprise Linux 5
php
Will not fix
Red Hat Enterprise Linux 5
php53
Will not fix
Red Hat Enterprise Linux 6
php
Will not fix
Red Hat Enterprise Linux 7
php
Will not fix
Red Hat Software Collections
php54-php
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | php | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | php53 | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | php | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | php | Will not fix | n/a |
| Red Hat Software Collections | php54-php | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the version of php and php53 as shipped with Red Hat Enterprise Linux 5. This issue affects the version of php as shipped with Red Hat Enterprise Linux 6 and 7. The Red Hat Security Response Team has rated this issue as having moderate security impact. This issue is not currently planned to be addressed in future updates. This issue may be mitigated with user code changes as noted in https://wiki.php.net/rfc/strict_sessions#current_solution
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:M/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 (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 3.62% (0.03616) | 89.15th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.60% (0.03600) | 87.94th | v5 (v2026.06.15) |
| Aug 19, 2025 | 0.69% (0.00685) | 70.72th | v4 (v2025.03.14) |
| Jul 26, 2025 | 1.88% (0.01879) | 82.34th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.72% (0.00724) | 70.88th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.74% (0.00741) | 81.53th | v3 (v2023.03.01) |
| May 10, 2024 | 0.61% (0.00610) | 78.52th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.52% (0.00516) | 76.45th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.37% (0.00373) | 72.11th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.34% (0.00341) | 70.68th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.74% (0.00741) | 77.91th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (8)
- http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=169b78eb79b0e080b67f9798708eb3771c6d0b2f x_refsource_CONFIRM
- http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=25e8fcc88fa20dc9d4c47184471003f436927cde x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2011-4718 Vendor Advisory
- https://bugs.php.net/bug.php?id=60491 x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=996774 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-4718
- https://wiki.php.net/rfc/strict_sessions x_refsource_MISC
- https://www.cve.org/CVERecord?id=CVE-2011-4718
| Link | Providers | Tags |
|---|---|---|
| http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=169b78eb79b0e080b67f9798708eb3771c6d0b2f | x_refsource_CONFIRM | |
| http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=25e8fcc88fa20dc9d4c47184471003f436927cde | x_refsource_CONFIRM | |
| https://access.redhat.com/security/cve/CVE-2011-4718 | Vendor Advisory | |
| https://bugs.php.net/bug.php?id=60491 | x_refsource_MISC | |
| https://bugzilla.redhat.com/show_bug.cgi?id=996774 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-4718 | ||
| https://wiki.php.net/rfc/strict_sessions | x_refsource_MISC | |
| https://www.cve.org/CVERecord?id=CVE-2011-4718 |
Change history (0)
No recorded changes yet.