Vulnerability identifier: #VU45856

Vulnerability risk: Low

CVSSv3.1: 4.7 [AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-16266

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MantisBT
Web applications / Other software

Vendor: mantisbt.sourceforge.net

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data passed via "An XSS issue was discovered" when saving it into a text Custom Field, leading to possible code execution in the browser of any user subsequently viewing the issue (if CSP settings allow it). A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website .

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Update to version 2.24.2.

Vulnerable software versions

MantisBT: 2.24.0 - 2.24.1

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External links
http://mantisbt.org/blog/archives/mantisbt/665
http://mantisbt.org/bugs/view.php?id=27056

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.