Bug #102751
Updated by Sven Proffe 11 months ago
In TYPO3\CMS\Core\Authentication\AbstractUserAuthentication, line 919 reads (as of current main):
<pre><code class="php">
if ($this->checkPid && $this->checkPid_value !== null) {
</code></pre>
As $this->checkPid_value $this->checkPid may be a string it may be empty, which is not checked. In that case TYPO3\CMS\Core\Authentication\AbstractAuthenticationService->fetchUserRecord() will end up with a corrupt SQL query containing a restriction like ... AND pid in ()...
So, I'd like to suggest to check for an empty string, as well.
<pre><code class="php">
if ($this->checkPid && $this->checkPid_value !== null && $this->checkPid_value !== '') {
</code></pre>