#VU83470 Cross-site scripting in AntiSamy - CVE-2022-28367

Vulnerability identifier: #VU83470

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-28367

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
AntiSamy
Universal components / Libraries / Libraries used by multiple products

Vendor: nahsra (Arshan Dabirsiaghi)

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks via HTML tag smuggling on STYLE content with crafted input. The output serializer does not properly encode the supposed Cascading Style Sheets (CSS) content.

The vulnerability exists due to insufficient sanitization of user-supplied data. 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

AntiSamy: 1.5.7 - 1.6.5

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External links
https://github.com/nahsra/antisamy/releases/tag/v1.6.6
https://github.com/nahsra/antisamy/commit/0199e7e194dba5e7d7197703f43ebe22401e61ae

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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.