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GHSA-jr8m-x4p7-p3v5

TYPO3 Remote Code Execution in extension "Site Crawler" (crawler)

Source: GitHub Advisory Database (reviewed) High CVE-2026-8727

Packages

EcosystemPackageAffectedFixed in
Packagist tomasnorre/crawler >= 12.0.0, < 12.0.11 12.0.11
Packagist tomasnorre/crawler < 11.0.13 11.0.13

Details

As written in the advisory (Markdown source, shown as plain text).

The TYPO3 Crawler extension passes the X-T3Crawler-Meta response header from crawled URLs directly to PHP's `unserialize()`. An attacker controlling a crawled endpoint can inject arbitrary serialized PHP objects, leading to Remote Code Execution on the TYPO3 server. Exploitation requires administrative privileges to configure a crawler-enabled page and trigger the crawl via a Scheduler task. This has been patched in versions 12.0.11 and 11.0.13.

References

External links from the advisory. They lead to third-party sites.