What is CVE-2011-4628?

CVE-2011-4628 is a critical-severity vulnerability in TYPO3, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-11-06.

How severe is CVE-2011-4628?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in TYPO3

CVE-2011-4628

TYPO3 before 4.3.12, 4.4.x before 4.4.9, and 4.5.x before 4.5.4 allows remote attackers to bypass authentication mechanisms in the backend through a crafted request.

Vulnerability class: Broken Authentication

Published 2019-11-06 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

TYPO3 — versions before 4.5.4

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security-tracker.debian.org/tracker/CVE-2011-4628 (Third Party Advisory)
typo3.org/security/advisory/typo3-core-sa-2011-001/ (Vendor Advisory)

Frequently asked questions

What is CVE-2011-4628?: CVE-2011-4628 is a critical-severity vulnerability in TYPO3, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-11-06.
How severe is CVE-2011-4628?: Critical severity. CVSS v3 base score is 9.8 out of 10.