What’s Vulnerable › Vulnerabilities
CVE-2026-8727: Remote Code Execution in extension "Site Crawler" (crawler)
- Severity: high (CVSS 7.1 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-19 · updated 2026-10-26
- Weakness: CWE-502
Description
The 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.
Affected products
- TYPO3 Extension "Site Crawler": from 12.0.0 before 12.0.11; before 11.0.13 — fixed in 11.0.13, 12.0.11
How to fix
Upgrade to a fixed version: TYPO3 Extension "Site Crawler" 11.0.13, 12.0.11. Check the vendor advisory for mitigations.
References
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