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CVE-2011-4903

19
FAUCET Score

CVE-2011-4903 describes a Cross-site Scripting (XSS) vulnerability in TYPO3 versions before 4.3.12, 4.4.9, and 4.5.4, allowing remote attackers to inject arbitrary web script or HTML via the RemoveXSS function. This medium-severity vulnerability (CVSS 6.1) has a network attack vector and low attack complexity, potentially leading to limited impact on confidentiality and integrity. 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

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.83%
Probability of exploitation in next 30 days
EPSS Percentile
53.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0083 is in the 63rd percentile among its peer group of 26,219 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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-q22w-r5qq-v3wfmedium

Typo3 XSS in RemoveXSS function

Apr 22, 2022

References

security-tracker.debian.org / tracker/CVE-2011-4903
Third Party Advisory
typo3.org / security/advisory/typo3-core-sa-2011-001
Vendor Advisory