Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learningUpgrade causal/oidc to version 2.1.0 or higher.
Affected versions of this package are vulnerable to Improper Access Control due to improper verification of the OpenID Connect authentication state from the user lookup chain. Specifically, the authentication service authenticates any valid frontend user from the user lookup chain if the tx_oidc frontend user field is not empty.
Note:
This flaw is exploitable in scenarios where either ext:felogin is active or the $GLOBALS['TYPO3_CONF_VARS']['FE']['checkFeUserPid'] is disabled, allowing an attacker to log in to OpenID Connect frontend user accounts by providing a valid username and any password.