CVE-2009-0256

highpriority · track · 31EPSS 0.018 · 78 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.79% (78th) EPSS

CVSS 7.5 · high

Is it mine?

26 products

Check your exposure

Who says so?

3 sources

enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.4–7.5

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v2.06.4mediumAV:N/AC:L/Au:N/C:P/I:P/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USprimaryCWE-287USCWE-384US

affected products (26)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
typo3 typo3= 4.0nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.0.1nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.0.2nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.0.3nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.0.4nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.0.5nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.0.6nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.0.7nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.0.8nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.0.9nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.1.0nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.1.1nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.1.2nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.1.3nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.1.4nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.1.5nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.1.6nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.1.7nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
typo3 typo3= 4.2.0nvdUScpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*

showing 20 of 26

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-q45q-5233-229pAuthentication library in TYPO3 vulnerable to session fixation2022-05-02ghsa · osvUS
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.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd osv NVD CVE.org MITRE

published 2009-01-22modified 2026-06-16

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+7710 more

references (12)

External citations — patches, advisories, analysis.

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