CVE-2025-24980: Pimcore Admin Classic Bundle allows user enumeration

Description Summary

Pimcore Admin Classic Bundle allows attackers to enumerate valid accounts because the Forgot password functionality uses different messages when the account is valid vs not.

Details -> error message discloses existing accounts and leads to user enumeration on the target via "Forgot password" function. since no generic error message is being implemented.

PoC !image

Enter first a valid account email address and click on submit !image

A green message validating the account exists is shown and a login link is sent to the email !image

now go back and use a random email from temp-mail to test with a non existant account !image

!image

click on submit and get an error in red that a problem occured !image

Impact user enumeration is a confidentiality threat , that could potentially lead to an attacker to enumerate valid accounts and maybe taking over accounts in case combined with credential stuffing on an organisation .

A remedition would be to change the error message in both cases ( valid and invalid emails ) to what we call a "synchronised error " it would be for example : " if the given email address is linked to an account , then a login link would be sent to that email " or something along those lines