What is CVE-2023-28604?

CVE-2023-28604 is a medium-severity vulnerability in Sitegeist Fluid Components, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-12-12.

How severe is CVE-2023-28604?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Sitegeist Fluid Components

CVE-2023-28604

The fluid_components (aka Fluid Components) extension before 3.5.0 for TYPO3 allows XSS via a component argument parameter, for certain {content} use cases that may be edge cases.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-12-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.5th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Sitegeist Fluid Components

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

typo3.org/security/advisory/typo3-ext-sa-2023-003 (Vendor Advisory)
github.com/sitegeist/fluid-components/blob/master/Documentation/XssIssue.md (Exploit, Mitigation, Issue Tracking)

Frequently asked questions

What is CVE-2023-28604?: CVE-2023-28604 is a medium-severity vulnerability in Sitegeist Fluid Components, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-12-12.
How severe is CVE-2023-28604?: Medium severity. CVSS v3 base score is 6.1 out of 10.