- Release Date: September 16, 2025
- Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
- Component: "Base Excel" (base_excel)
- Composer Package Name: jambagecom/base-excel
- Vulnerability Type: Server-Side Request Forgery
- Affected Versions: 4.5.0 and below
- Severity: High
- Suggested CVSS v4.0: AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- References: CVE-2025-54370, CWE-918
Problem Description
The TER extension bundles the PHP package “phpoffice/phpspreadsheet”, which is affected by a Server-Side Request Forgery vulnerability.
Solution
An updated version 5.1.0 is available from the TYPO3 extension manager, packagist and at
https://extensions.typo3.org/extension/download/base_excel/5.1.0/zip
Users of the extension are advised to update the extension as soon as possible.
Credits
Thanks to Franz Holzinger for providing an updated version of the extension.
General Advice
Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list.