Atomicorp WAF Research Note: CVE-2021-24405

Research Notes

This page documents research related to exploit techniques, attack behaviors, testing results, and WAF rule interactions associated with this vulnerability.

Research finding: this note documents observed WAF protections relevant to exploit techniques associated with this vulnerability.

These notes are not intended to represent the full set of vulnerabilities mitigated by Atomicorp products and should not be interpreted as a coverage matrix, certification list, or census of protected CVEs.

Atomicorp WAF protections are primarily designed around attack techniques and exploit behaviors rather than individual vulnerability identifiers. A published research note documents a positive research finding related to that CVE. If a CVE is absent from these notes, no conclusion should be drawn about protection status.

Vulnerability Description

The Easy Cookies Policy WordPress plugin through 1.6.2 is lacking any capability and CSRF check when saving its settings, allowing any authenticated users (such as subscriber) to change them. If users can’t register, this can be done through CSRF. Furthermore, the cookie banner setting is not sanitised or validated before being output in all pages of the frontend and the backend settings one, leading to a Stored Cross-Site Scripting issue.

Public Vulnerability References

CVE Details

CVE: CVE-2021-24405
Name: WordPress Plugin Easy Cookie Policy 1.6.2 - Broken Access Control to Stored XSS
Severity: MEDIUM
CVSS: 6.5 (Medium)
CVSS source: N/A
Vendor: izsoft
Product: easy cookies policy
Latest protected observation: 2026-07-28
Rule IDs observed: 390585, 390726, 392647

Test or Research Source

Source: Exploit-DB 50849
Tags: CVE-2021-24405, cve, exploitdb, http, replay

Research Note Context

This research note documents exploit-technique analysis associated with this vulnerability and references Atomicorp WAF protections observed during engineering review, testing, or validation activities.

Atomicorp security controls are generally designed to identify and mitigate attack techniques and exploit behaviors rather than individual CVE identifiers. As a result, protections developed for one vulnerability may also apply to related attack variants and future vulnerabilities using similar techniques.

Learn More

Atomicorp develops commercially supported security technologies for web applications, servers, endpoints, workloads, and legacy enterprise platforms.

Organizations interested in protecting systems against exploit techniques associated with vulnerabilities such as this one can learn more about:

Atomic ModSecurity Rules: commercially maintained WAF rules for ModSecurity deployments, including protections for web attacks, bots, scanners, malware, exploitation attempts, and emerging vulnerability classes.
Atomic WAF: an enterprise web application firewall with Atomicorp rules, centralized management, reporting, authentication controls, and operational tooling.
Atomic ModSecurity Integrator: a special licensing option for MSPs, MSSPs, OEMs, VARs, reverse proxy providers, and other integrators who want to incorporate Atomicorp ModSecurity rule technology into their own products or services.
Atomic OSSEC: an enterprise OSSEC-based intrusion detection, compliance, and security monitoring platform.
Atomic Protector: workload protection for Linux, web, cloud, data center, and hybrid environments.

For additional information, product evaluations, or technical discussions, visit https://www.atomicorp.com/ or https://modsecurity.io/ .