#VU15314 Security restrictions bypass in Joomla! - CVE-2018-17857

Vulnerability identifier: #VU15314

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-17857

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Joomla!
Web applications / CMS

Vendor: Joomla!

Description

The vulnerability allows a remote authenticated attacker to bypass security restrictions on the target system.

The vulnerability exists due to insufficient security checks of the tags search fields. A remote attacker can submit specially crafted mail using disabled forms to bypass security restrictions and conduct further attacks.

Mitigation
Update to version 3.8.13.

Vulnerable software versions

Joomla!: 3.0.4, 3.1.0 - 3.1.6, 3.2.0 - 3.2.7, 3.3.0 - 3.3.6, 3.4.0 - 3.4.8, 3.5.0 - 3.5.9, 3.6.0 - 3.6.5, 3.7.0 - 3.7.5, 3.8.0 - 3.8.12

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External links
https://developer.joomla.org/security-centre/753-20181003-core-access-level-violation-in-com-tags

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.