CVE-2024-31421

Popup by Supsystic <= 1.10.27 - Missing Authorization

2024-04-10 00:00

Strategic Overview

Status: Patched in 1.10.28
Affected Plugin: Smart Popup by Supsystic
Affected Version: <= 1.10.27
CVSS: 4.3Medium
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2024-31421

View all Smart Popup by Supsystic vulnerabilities

At a glance

CVE-2024-31421 is a medium-severity Missing Authorization vulnerability in the Smart Popup by Supsystic WordPress plugin, affecting versions <= 1.10.27. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). The root cause is a missing authorization check on a reachable function. The issue is fixed in version 1.10.28; sites on affected versions should update now. Disclosed April 2024, reported by Steven Julian.

Vulnerability Overview

The Popup by Supsystic plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in versions up to, and including, 1.10.27. This makes it possible for authenticated attackers, with subscriber-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-862: Missing Authorization

Reaching this weakness in Smart Popup by Supsystic <= 1.10.27 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Smart Popup by Supsystic the fix is 1.10.28: builds <= 1.10.27 are affected, anything from 1.10.28 onward is not.

Remediation

Update to version 1.10.28, 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 Popup by Supsystic 1.10.28 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2024-31421 https://www.wordfence.com/threat-intel/vulnerabilities/id/73b99342-65ca-4f63-b1ea-638255821265 https://nvd.nist.gov/vuln/detail/CVE-2024-31421

Related records

Same weakness class

5.3CVE-2026-73381: Smart Popup by Supsystic Missing AuthorizationCVE-2026-73381

Other vulnerabilities in Smart Popup by Supsystic

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/