UpHeron
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Servers and applications

CVE-2009-0255

The System extension Install tool in TYPO3 4.0.0 through 4.0.9, 4.1.0 through 4.1.7, and 4.2.0 through 4.2.3 creates the encryption key with an insufficiently random seed, which makes it easier for attackers to crack the key.

Severity
High 7.5
Published
22 Jan 2009
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.0.10, 4.1.8, 4.2.4
Exploit chance
9.4% in the next 30 daysHigher than 95% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Insufficiently random values (CWE-330)
Attack
Over the network · No login needed · No user action needed
Attacker can
Read data
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Sources
NVD

Affected software

SoftwareAffected versions
TYPO3Servers and applications · cpe:a:typo3:typo3
  • From 4.0 before 4.0.10
  • From 4.1.0 before 4.1.8
  • From 4.2.0 before 4.2.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-0255
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-0255