WordPress theme

Squaretype — Modern Blog WordPress Theme < 3.0.4 - Authorization Bypass

CVE-2021-24840Published Oct 11, 2021 · Updated Nov 13, 2026

Affected: <3.0.4Update to 3.0.4 or newer

All remediation steps

Watch theme

Medium5.3CVSS 3.15.3CISA KEVNot listedAccessNo account needed

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Overview

Advisory ID: CVE-2021-24840
Product: Squaretype - Modern Blog WordPress Theme squaretype
Affected: <3.0.4
Fixed in: 3.0.4
Weakness: CWE-639 Authorization Bypass Through User-Controlled Key
Required access: No account needed
Published: Oct 11, 2021 · updated Nov 13, 2026
Credit: Emil Kylander Edwartz
Source: Wordfence Intelligence

Affected< 3.0.4
Patched in3.0.4

5.3

CVSS 3.1 · CNA (Wordfence)

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

What does this vector mean?

AV:N Attack vector: Network
AC:L Attack complexity: Low
PR:N Privileges required: None
UI:N User interaction: None
S:U Scope: Unchanged
C:L Confidentiality: Low
I:N Integrity: None
A:N Availability: None

The Squaretype WordPress theme before 3.0.4 allows unauthenticated users to manipulate the query_vars used to retrieve the posts to display in one of its REST endpoint, without any validation. As a result, private and scheduled posts could be retrieved via a crafted request.

Not sure which version you run? Run a passive check — it reads public files only.

Remediation & mitigations

Update to version 3.0.4, or a newer patched version
Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.

References & provenance

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

Advisorywordfence.com

Timeline

Oct 11, 2021
CVE published
Severity medium, CVSS 5.3
Nov 13, 2026
Record last updated

Sources & licenses

Wordfence record

Vulnerability data: Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers: Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE: National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.

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