#VU68954 Incorrect Regular Expression in sanitize-html - CVE-2022-25887

Vulnerability identifier: #VU68954

Vulnerability risk: Medium

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

CVE-ID: CVE-2022-25887

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
sanitize-html
Web applications / Modules and components for CMS

Vendor: ApostropheCMS

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing regular expressions. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

sanitize-html: 2.0.0 - 2.7.0

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External links
https://security.snyk.io/vuln/SNYK-JS-SANITIZEHTML-2957526
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-3008102
https://github.com/apostrophecms/sanitize-html/pull/557
https://github.com/apostrophecms/sanitize-html/commit/b4682c12fd30e12e82fa2d9b766de91d7d2cd23c

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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.