CVE-2026-78150

Smart Post – Post Grid, Post Carousel, Post Slider Gutenberg Blocks for Blog & News 4.0.0 - 4.0.7 - Authenticated (Contributor+) Insecure Direct Object Reference

2026-09-05 00:00

Strategic Overview

Status: Patched in 4.0.8
Affected Plugin: Smart Post – Post Grid, Post Carousel, Post Slider Gutenberg Blocks for Blog & News
Affected Version: 4.0.0 – 4.0.7
CVSS: 4.3Medium
Weakness type: CWE-639 · Authorization Bypass Through User-Controlled Key
CVE: CVE-2026-78150

View all Smart Post – Post Grid, Post Carousel, Post Slider Gutenberg Blocks for Blog & News vulnerabilities

At a glance

CVE-2026-78150 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the Smart Post WordPress plugin, affecting versions 4.0.0 – 4.0.7. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 4.0.8; sites on affected versions should update now. Disclosed September 2026, reported by Revanth Hari Narayana Matte.

Vulnerability Overview

The Smart Post – Post Grid, Post Carousel, Post Slider Gutenberg Blocks for Blog & News plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions 4.0.0 through 4.0.7. This is due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to perform an unauthorized action.

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.

CWE-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in Smart Post 4.0.0 – 4.0.7 takes an account at Contributor level or above. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For Smart Post the fix is 4.0.8: builds 4.0.0 – 4.0.7 are affected, anything from 4.0.8 onward is not.

Remediation

Update to version 4.0.8, 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: Smart Post 4.0.8 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-78150 https://www.wordfence.com/threat-intel/vulnerabilities/id/c16efcb1-ed1f-4370-9013-e5dfb64fc1c2 https://nvd.nist.gov/vuln/detail/CVE-2026-78150

Related records

CVSS Vector

4.3

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

Base

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

This record contains material that is subject to copyright

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/