XSS in Tiki Wiki CMS Groupware

1) Cross-site scripting

EUVDB-ID: #VU6852

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-9305

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.

The vulnerability exists due to insufficient sanitization of user-supplied data in tiki-batch_send_newsletter.php (vulnerable code resides within lib/core/TikiFilter/PreventXss.php). A remote attacker can trick the victim to follow a specially crafted link, bypass implemented XSS protection 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

Install update from vendor's repository.

Vulnerable software versions

Tiki Wiki CMS Groupware: 16.2

External links

http://github.com/tikiorg/tiki/commit/6c016e8f066d2f404b18eaa1af7fa0c7a9651ccd
http://www.cdxy.me/?p=763

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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