What is CVE-2011-4907?

CVE-2011-4907 is a medium-severity vulnerability in Joomla Joomla\!, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.3/10. Published 2020-01-15.

How severe is CVE-2011-4907?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Arbitrary file upload in Joomla Joomla\!

CVE-2011-4907

Joomla! 1.5x through 1.5.12: Missing JEXEC Check

Vulnerability class: Unrestricted File Upload

Published 2020-01-15 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Joomla Joomla\!
Joomla! — versions 1.5x through 1.5.12

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

www.openwall.com/lists/oss-security/2011/12/25/7 (Mailing List, Third Party Advisory)
developer.joomla.org/security/news/301-20090722-core-file-upload.html (Vendor Advisory)

Frequently asked questions

What is CVE-2011-4907?: CVE-2011-4907 is a medium-severity vulnerability in Joomla Joomla\!, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.3/10. Published 2020-01-15.
How severe is CVE-2011-4907?: Medium severity. CVSS v3 base score is 5.3 out of 10.