Cross-site scripting in Branch.io

1) DOM-based cross-site scripting

EUVDB-ID: #VU15362

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: N/A

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 within branch.io toolkit due to insufficient sanitization of user-supplied data. The vulnerability allows a user with permissions to edit which attribute is used in the breadcrumbs bar to store code that will be executed on the client side.

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 to the latest version from vendor's website.

Vulnerable software versions

Branch.io: All versions

External links

http://www.vpnmentor.com/blog/dom-xss-bug-affecting-tinder-shopify-yelp/

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.