Cyber Resilience

CVE-2026-24983

High

Published: 25 March 2026

Published
25 March 2026
Modified
24 April 2026
KEV Added
—
Patch
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CVSS Score v3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
EPSS Score 0.0004 14.4th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-24983 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 14.4th 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 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).

Deeper analysis

CVE-2026-24983 is an Improper Neutralization of Input During Web Page Generation vulnerability, enabling Reflected Cross-site Scripting (XSS) as classified under CWE-79. It affects the UpSolution Core (us-core) plugin for WordPress, with versions from n/a through 8.41 inclusive vulnerable.

The vulnerability carries a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L). Unauthenticated attackers with network access can exploit it through low-complexity attacks requiring user interaction, such as following a malicious link. Exploitation changes the scope and results in low impacts to confidentiality, integrity, and availability.

Patchstack's advisory at https://patchstack.com/database/Wordpress/Plugin/us-core/vulnerability/wordpress-upsolution-core-plugin-8-41-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve documents this Reflected XSS issue in UpSolution Core version 8.41, providing details relevant to mitigation for affected WordPress installations.

EU & UK References

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in UpSolution UpSolution Core us-core allows Reflected XSS.This issue affects UpSolution Core: from n/a through <= 8.41.

CWE(s)
CWE-79

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 →
T1059.007 JavaScript Execution
Adversaries may abuse various implementations of JavaScript for execution.
attack.mitre.org →
Why these techniques?

Reflected XSS in public-facing WordPress plugin directly enables T1190 (exploitation of web app input neutralization flaw) and T1059.007 (arbitrary JavaScript execution via crafted malicious link requiring user interaction).

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

CVEs Like This One

CVE-2026-3231Shared CWE-79
CVE-2025-23481Shared CWE-79
CVE-2025-69302Shared CWE-79
CVE-2025-23734Shared CWE-79
CVE-2025-23571Shared CWE-79
CVE-2025-65110Shared CWE-79
CVE-2026-24948Shared CWE-79
CVE-2025-27352Shared CWE-79
CVE-2025-30349Shared CWE-79
CVE-2026-3876Shared CWE-79

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Directly mitigates CVE-2026-24983 by identifying, reporting, and correcting the reflected XSS flaw in the UpSolution Core plugin through timely patching.

SI-15 Information Output Filtering good match
prevent

Prevents reflected XSS exploitation in CVE-2026-24983 by filtering information outputs to remove or prohibit special characters that enable malicious script injection.

SI-10 Information Input Validation good match
prevent

Addresses the improper neutralization of input in CVE-2026-24983 by validating user inputs to block malicious payloads before web page generation.

References