CVE-2009-0256
Authentication library in TYPO3 vulnerable to session fixation
Session fixation vulnerability in the authentication library in TYPO3 4.0.0 through 4.0.9, 4.1.0 through 4.1.7, and 4.2.0 through 4.2.3 allows remote attackers to hijack web sessions via unspecified vectors related to (1) frontend and (2) backend authentication.
Exploit likelihood
What each source reports
NVD Score used
Session fixation vulnerability in the authentication library in TYPO3 4.0.0 through 4.0.9, 4.1.0 through 4.1.7, and 4.2.0 through 4.2.3 allows remote attackers to hijack web sessions via unspecified vectors related to (1) frontend and (2) backend authentication.
- Record
CVE-2009-0256- CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
Session fixation vulnerability in the authentication library in TYPO3 4.0.0 through 4.0.9, 4.1.0 through 4.1.7, and 4.2.0 through 4.2.3 allows remote attackers to hijack web sessions via unspecified vectors related to (1) frontend and (2) backend authentication.
- Record
CVE-2009-0256- Updated
- 2026-11-02
EUVDEUVD-2022-4874 No score
Session fixation vulnerability in the authentication library in TYPO3 4.0.0 through 4.0.9, 4.1.0 through 4.1.7, and 4.2.0 through 4.2.3 allows remote attackers to hijack web sessions via unspecified vectors related to (1) frontend and (2) backend authentication.
- Record
EUVD-2022-4874- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q45q-5233-229p No score
Authentication library in TYPO3 vulnerable to session fixation
Session fixation vulnerability in the authentication library in TYPO3 4.0.0 through 4.0.9, 4.1.0 through 4.1.7, and 4.2.0 through 4.2.3 allows remote attackers to hijack web sessions via unspecified vectors related to (1) frontend and (2) backend authentication.
- Record
GHSA-q45q-5233-229p- Weakness
- CWE-287, CWE-384
- Updated
- 2026-11-02
OSVGHSA-q45q-5233-229p No score
Authentication library in TYPO3 vulnerable to session fixation
Session fixation vulnerability in the authentication library in TYPO3 4.0.0 through 4.0.9, 4.1.0 through 4.1.7, and 4.2.0 through 4.2.3 allows remote attackers to hijack web sessions via unspecified vectors related to (1) frontend and (2) backend authentication.
- Record
GHSA-q45q-5233-229p- Weakness
- CWE-287, CWE-384
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
typo3/cmsPackagist |
4.0.0 to 4.0.9 | 4.0.10 |
typo3/cmsPackagist |
4.1.0 to 4.1.7 | 4.1.8 |
typo3/cmsPackagist |
4.2.0 to 4.2.3 | 4.2.4 |
typo3-srcDebian:4.0 From an advisory covering 4 CVEs |
before 4.0.2+debian-7 | 4.0.2+debian-7 |
typo3/cmsPackagist |
4.0.0 up to 4.0.10 | 4.0.10 |
typo3/cmsPackagist |
4.1.0 up to 4.1.8 | 4.1.8 |
typo3/cmsPackagist |
4.2.0 up to 4.2.4 | 4.2.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-0256 is a high vulnerability (CVSS 7.5) in Typo3, published January 22, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.79%, the 78th percentile. Fixed in typo3/cms 4.0.10.