UpHeron
All vulnerabilities

Servers and applications

CVE-2009-0256

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.

Severity
High 7.5
Published
22 Jan 2009
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.8% in the next 30 daysHigher than 78% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper authentication (CWE-287)
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
TYPO3Servers and applications · cpe:a:typo3:typo3
  • Version 4.2.3
  • Version 4.2.2
  • Version 4.2.1
  • Version 4.2.0
All 24 release lines
  • Version 4.0
  • Version 4.0.1
  • Version 4.0.2
  • Version 4.0.3
  • Version 4.0.4
  • Version 4.0.5
  • Version 4.0.6
  • Version 4.0.7
  • Version 4.0.8
  • Version 4.0.9
  • Version 4.1.0-beta1
  • Version 4.1.0-rc1
  • Version 4.1.0
  • Version 4.1.1
  • Version 4.1.2
  • Version 4.1.3
  • Version 4.1.4
  • Version 4.1.5
  • Version 4.1.6
  • Version 4.1.7
  • Version 4.2.0
  • Version 4.2.1
  • Version 4.2.2
  • Version 4.2.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-0256
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-0256