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CVE-2011-4628

28
FAUCET Score

CVE-2011-4628 describes a critical authentication bypass vulnerability affecting TYPO3 versions prior to 4.3.12, 4.4.9, and 4.5.4. This flaw allows remote attackers to gain unauthorized access to the backend through a specially crafted request. With a CVSS score of 9.8, this vulnerability is highly severe, requiring no user interaction or complex attack steps, and potentially leading to complete compromise of confidentiality, integrity, and availability. Despite its critical nature, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.3.0, < 4.3.12CPE matchmatch criteria
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
>= 4.4.0, < 4.4.9CPE matchmatch criteria
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
>= 4.5.0, < 4.5.4CPE matchmatch criteria
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.65%
Probability of exploitation in next 30 days
EPSS Percentile
74.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0164 is in the 62nd percentile among its peer group of 36,821 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

composerpatch availablevia ghsa
Product: typo3/cmsFixed in: 4.3.12
composerpatch availablevia ghsa
Product: typo3/cmsFixed in: 4.4.9
composerpatch availablevia ghsa
Product: typo3/cmsFixed in: 4.5.4

Vendor Advisories (1)

composerGHSA-79gv-5cgx-x6rxcritical

Typo3 Authentication Bypass

Apr 22, 2022

References

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