CVE-2019-15775

ND Learning <= 4.7 - Open Redirect

2019-08-06 00:00

Strategic Overview

Status: Patched in 4.8
Affected Plugin: Learning Courses
Affected Version: <= 4.7
CVSS: 6.1Medium
Weakness type: CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
CVE: CVE-2019-15775

View all Learning Courses vulnerabilities

At a glance

CVE-2019-15775 is a medium-severity URL Redirection to Untrusted Site ('Open Redirect') vulnerability in the Learning Courses WordPress plugin, affecting versions <= 4.7. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 4.8; sites on affected versions should update now. Disclosed August 2019, reported by Jerome Bruandet.

Vulnerability Overview

The ND Learning plugin before 4.8 for WordPress has a nopriv_ AJAX action that allows modification of the siteurl setting.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

Reaching this weakness in Learning Courses <= 4.7 takes a caller who can reach the endpoint. An open redirect is a page that takes a destination from the request and sends the browser there without checking that the destination belongs to the site.

A link that starts on a trusted domain finishes on an attacker's, which is what makes phishing and consent-screen abuse credible to the person clicking it. For Learning Courses the fix is 4.8: builds <= 4.7 are affected, anything from 4.8 onward is not.

Remediation

Update to version 4.8, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Learning Courses: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Learning Courses 4.8 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2019-15775 https://www.wordfence.com/threat-intel/vulnerabilities/id/d68841f1-f3f2-45e7-8a4f-d2d65624b617 https://nvd.nist.gov/vuln/detail/CVE-2019-15775

Related records

Other vulnerabilities in Learning Courses

5.5CVE-2021-24707: Learning Courses < 5.0 Cross-Site ScriptingCVE-2021-24707

CVSS Vector

6.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityNone
IntegrityLow
AvailabilityLow

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