Multiple XSS in CandidATS leads to account takeover

Description

CandidATS version 3.0.0 allows an external attacker to steal the cookie of arbitrary users. This is possible because the application application does not properly validate user input against XSS attacks.

Vulnerability

The XSS present in CandidATS 3.0.0, allows an unauthenticated remote attacker to perform an Account Takeover. To trigger this vulnerability, we will need to send the following malicious link to an administrator in order to hack their account:

https://demo.candidats.net/ajax.php?f=getPipelineJobOrder&joborderID=50&page=0&entriesPerPage=15&sortBy=dateCreatedInt&sortDirection=desc&indexFile=index.php%27);%22%3E%3Cscript%3Ealert(document.cookie);%3C/script%3E%3C!--&isPopup=0

During the investigation, several parameters of the above URL were found to be vulnerable to XSS:

1. indexFile (CVE-2022-42746)

2. sortBy (CVE-2022-42747)

3. sortDirection (CVE-2022-42748)

4. page (CVE-2022-42749)

Different CVE-IDs were reserved for these vulnerabilities because when analyzing the source code, we realized that each of these flaws is fixed independently.

Exploitation

In this attack we will obtain the administrator user account, through a malicious link:

Our security policy

We have reserved the CVE-2022-42746, CVE-2022-42747, CVE-2022-42748, CVE-2022-42749 to refer to these issues from now on. Disclosure policy

System Information

• Version: CandidATS 3.0.0

• Operating System: GNU/Linux

Mitigation

There is currently no patch available for this vulnerability.

References

• Vendor page https://candidats.net/