#VU31205 Cross-site scripting in Moodle - CVE-2018-14631

Vulnerability identifier: #VU31205

Vulnerability risk: Low

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:Clear]

CVE-ID: CVE-2018-14631

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Moodle
Web applications / Other software

Vendor: moodle.org

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

moodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the search parameter.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Moodle: 3.5.0 beta - 3.5.1

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External links
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-62857
https://www.securityfocus.com/bid/105371
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14631
https://moodle.org/mod/forum/discuss.php?d=376025

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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.