CVE-2021-24742

Logo Slider and Showcase <= 1.3.36 - Settings Update

2021-10-04 00:00

Strategic Overview

Status: Patched in 1.3.37
Affected Plugin: Logo Slider and Showcase
Affected Version: < 1.3.37
CVSS: 6.5Medium
Weakness type: CWE-863 · Incorrect Authorization
CVE: CVE-2021-24742

View all Logo Slider and Showcase vulnerabilities

At a glance

CVE-2021-24742 is a medium-severity Incorrect Authorization vulnerability in the Logo Slider and Showcase WordPress plugin, affecting versions < 1.3.37. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high integrity impact). The issue is fixed in version 1.3.37; sites on affected versions should update now. Disclosed October 2021, reported by apple502j.

Vulnerability Overview

The Logo Slider and Showcase WordPress plugin before 1.3.37 allows Editor users to update the plugin's settings via the rtWLSSettings AJAX action because it uses a nonce for authorisation instead of a capability check.

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 interaction from a victim user. A successful exploit has high impact on integrity.

CWE-863: Incorrect Authorization

Reaching this weakness in Logo Slider and Showcase < 1.3.37 takes a caller who can reach the endpoint. Incorrect authorization means a permission check exists but evaluates the wrong thing, so it passes for callers it was meant to stop.

The action runs for users the code intended to exclude, with the same effect as having no check at all. For Logo Slider and Showcase the fix is 1.3.37: builds < 1.3.37 are affected, anything from 1.3.37 onward is not.

Remediation

Update to version 1.3.37, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Logo Slider and Showcase 1.3.37 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24742 https://www.wordfence.com/threat-intel/vulnerabilities/id/b7ac9097-b02b-4f0a-8bc3-6c6af0bdab89 https://nvd.nist.gov/vuln/detail/CVE-2021-24742

CVSS Vector

6.5

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone

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