Cross-site scripting in DzzOffice

1) Cross-site scripting

Risk: Low

CVSSv3:
5.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:U/RC:C] [PCI]

CVE-ID:
CVE-2021-3318

CWE-ID:
CWE-79 – Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’)

Exploit availability:
No

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data passed via the “editorid” parameter in attach/ajax.php. 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

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

DzzOffice: 1.3.1, 2.01, 2.02, 2.02.1

CPE

External links

https://github.com/zyx0814/dzzoffice/issues/173

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open an attachment in an e-mail message.

Is there known malware, which exploits this vulnerability?

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