Vulnerability identifier: #VU21920

Vulnerability risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-16523

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Events Manager WordPress Plugin
Web applications / Other software

Vendor: Marcus Sykes

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to improper encoding and insertion of data provided to the "map_style" attribute of shortcodes ("locations_map" and "events_map"). A remote authenticated attacker can permanently inject 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
Install update from vendor's website.

Vulnerable software versions

Events Manager WordPress Plugin: 1.0 - 5.9.5

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External links
http://github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20190913-03_WordPress_Plugin_Events_Manager
http://wordpress.org/plugins/events-manager/#developers

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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. However, proof of concept for this vulnerability is available.