#VU45361 Cross-site scripting in Vanilla - CVE-2011-0526

Vulnerability identifier: #VU45361

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-0526

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Vanilla
Other software / Other software solutions

Vendor: Lussumo

Description

Vulnerability allows a remote attacker to perform Cross-site scripting attacks.

An input validation error exists in index.php in Vanilla Forums before 2.0.17 when processing Target parameter in a /entry/signin action. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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 website.

Vulnerable software versions

Vanilla: 2.0.9 - 2.0.15

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External links
https://openwall.com/lists/oss-security/2011/01/27/2
https://openwall.com/lists/oss-security/2011/01/27/5
https://secunia.com/advisories/43074
https://www.osvdb.org/70677
https://www.vanillaforums.org/discussion/14397/vanilla-2.0.17-released
https://yehg.net/lab/pr0js/advisories/%5Bvanilla_forums-2.0.16%5D_cross_site_scripting

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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.