Vulnerability in TYPO3

CVE-2022-23500

TYPO3 is an open source PHP based web content management system. In versions prior to 9.5.38, 10.4.33, 11.5.20, and 12.1.1, requesting invalid or non-existing resources via HTTP triggers the page error handler, which again could retrieve content to be shown as an error message from another page. This leads to a scenario in which the application is calling itself recursively - amplifying the impact of the initial attack until the limits of the web server are exceeded. This vulnerability is very similar, but not identical, to the one described in CVE-2021-21359. This issue is patched in versions 9.5.38 ELTS, 10.4.33, 11.5.20 or 12.1.1.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2022-23500: held from 0.007 to 0.007.

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

Affected products

  • TYPO3 — versions >= 9.0.0, < 9.5.38, >= 10.0.0, < 10.4.33, >= 11.0.0, < 11.5.20

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2022-23500?
CVE-2022-23500 is a medium-severity vulnerability in TYPO3, classified under Uncontrolled Recursion. CVSS score: 5.9/10. Published 2022-12-14.
How severe is CVE-2022-23500?
Medium severity. CVSS v3 base score is 5.9 out of 10.