Multiple vulnerabilities in LearnPress – WordPress LMS Plugin

Published: 2020-04-29

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-11510 CVE-2020-11511
CWE-ID	CWE-284 CWE-264
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software	LearnPress - WordPress LMS Plugin Web applications / Modules and components for CMS
Vendor	ThimPress

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper access control

EUVDB-ID: #VU27424

Risk: Medium

CVSSv4.0: 5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-11510

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in several tasks via AJAX actions that lacked nonce checks and capability checks. A remote authenticated attacker can send a specially crafted request to "wp-admin/admin-ajax.php", publish or trash any existing post or page, or create the default pages, or even set it to a nonexistent status.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

LearnPress - WordPress LMS Plugin: 2.2.1 - 3.2.6.8

CPE2.3

External links

https://wpvulndb.com/vulnerabilities/10194/
https://www.wordfence.com/blog/2020/04/high-severity-vulnerabilities-patched-in-learnpress/

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.

2) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU27425

Risk: High

CVSSv4.0: 7.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2020-11511

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the "LP Instructor" role grants the "unfiltered_html" capability. A remote attacker can send a specially crafted request to "wp-admin/admin-post.php" with the "action" parameter set to "accept-to-be-teacher" and the "user_id" parameter set to the ID of the user and elevate the permissions of a user of their choice.