What is CVE-2011-4631?

CVE-2011-4631 is a medium-severity vulnerability in TYPO3, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-11-06.

How severe is CVE-2011-4631?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in TYPO3

CVE-2011-4631

Cross-site Scripting (XSS) in TYPO3 before 4.3.12, 4.4.x before 4.4.9, and 4.5.x before 4.5.4 allows remote attackers to inject arbitrary web script or HTML via the system extension recycler.

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

TYPO3 — versions before 4.5.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-tracker.debian.org/tracker/CVE-2011-4631 (Third Party Advisory)
typo3.org/security/advisory/typo3-core-sa-2011-001/ (Vendor Advisory)

Frequently asked questions

What is CVE-2011-4631?: CVE-2011-4631 is a medium-severity vulnerability in TYPO3, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-11-06.
How severe is CVE-2011-4631?: Medium severity. CVSS v3 base score is 5.4 out of 10.