CVE-2026-24536

Medium

Published: 23 January 2026

Published

23 January 2026

Modified

23 April 2026

KEV Added

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Patch

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CVSS Score v3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Score 0.0001 3.1th percentile

Risk Priority 11 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-24536 is a medium-severity Exposure of Sensitive System Information to an Unauthorized Control Sphere (CWE-497) vulnerability. Its CVSS base score is 5.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 3.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and AC-4 (Information Flow Enforcement).

Deeper analysis

CVE-2026-24536 is an Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability (CWE-497) in the webpushr-web-push-notifications WordPress plugin. This flaw allows retrieval of embedded sensitive data and affects all versions of the Webpushr plugin up to and including 4.38.0.

Remote unauthenticated attackers can exploit this vulnerability over the network with low attack complexity and no user interaction required. Exploitation results in low-impact disclosure of sensitive system information, with no effects on integrity or availability, as reflected in the CVSS v3.1 base score of 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

The Patchstack advisory documents this sensitive data exposure issue specifically in Webpushr plugin version 4.38.0 for WordPress, available at https://patchstack.com/database/Wordpress/Plugin/webpushr-web-push-notifications/vulnerability/wordpress-webpushr-plugin-4-38-0-sensitive-data-exposure-vulnerability?_s_id=cve.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-4383

Vulnerability details

Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability in webpushr Webpushr webpushr-web-push-notifications allows Retrieve Embedded Sensitive Data.This issue affects Webpushr: from n/a through <= 4.38.0.

CWE(s): CWE-497

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1082 System Information Discovery Discovery

An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture.

attack.mitre.org →

Why these techniques?

The unauthenticated remote exposure in a public-facing WordPress plugin directly enables exploitation of a public-facing application (T1190) to obtain sensitive system information, which facilitates System Information Discovery (T1082).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1