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GHSA-v6xv-rmqc-wcc8
No affected components available
The frontend rendering component in TYPO3 4.5.x before 4.5.39, 4.6.x through 6.2.x before 6.2.9, and 7.x before 7.0.2, allows remote attackers to change URLs to arbitrary domains.
An attacker could forge a request which modifies anchor only links on the homepage of a TYPO3 installation such that they point to arbitrary domains, if the configuration option config.prefixLocalAnchors is used with any possible value. TYPO3 versions 4.6.x and higher are only affected if the homepage is not a shortcut to a different page. As an additional pre-condition, URL rewriting must be enabled in the web server (which it typically is) when using extensions like realurl or cooluri.
Installations where config.absRefPrefix is additionally set to any value are not affected by this vulnerability.
Example of affected configuration:
config.absRefPrefix =
config.prefixLocalAnchors = all
page = PAGE
page.10 = TEXT
page.10.value = <a href="#skiplinks">Skiplinks</a>
.htaccess:
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule .* index.php [L]
Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.
No exploitation activity has been observed at this time. Continue routine monitoring.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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