Is CVE-2009-0255 being actively exploited?

CVE-2009-0255 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-0255?

CVE-2009-0255 has a CVSS 3.1 base score of 7.5 (HIGH).

CVE-2009-0255

HIGH · CVSS 7.5EPSS 9.4%EU EUVD

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.

Key facts

CVSS score: 7.5 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-330
EPSS score: 9.4% (95th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-0263)
Published: January 22, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-0263 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

debian / debian linux
typo3 / typo3

References

http://secunia.com/advisories/33617(Broken Link, Vendor Advisory)
http://secunia.com/advisories/33679(Broken Link, Vendor Advisory)
http://typo3.org/teams/security/security-bulletins/typo3-sa-2009-001/(Vendor Advisory)
http://www.debian.org/security/2009/dsa-1711(Mailing List)
http://www.securityfocus.com/bid/33376(Broken Link, Third Party Advisory, VDB Entry)
https://exchange.xforce.ibmcloud.com/vulnerabilities/48132(Third Party Advisory, VDB Entry)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain