#VU88882 Improper Neutralization of Special Elements in Output Used by a Downstream Component in Contao - CVE-2024-28234

Vulnerability identifier: #VU88882

Vulnerability risk: Low

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

CVE-ID: CVE-2024-28234

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Contao
Web applications / CMS

Vendor: Contao

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to insufficient BBCode sanitization. A remote attacker can inject CSS styles.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Contao: 4.0 - 5.3.3

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External links
https://github.com/contao/contao/security/advisories/GHSA-j55w-hjpj-825g
https://github.com/contao/contao/commit/55b995d8d35da0d36bc6a22c53fe6423ab0c4ae2
https://github.com/contao/contao/commit/6d42e667177c972ae7c219645593c262d7764ce2
https://contao.org/en/security-advisories/insufficient-bbcode-sanitization

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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.