Cyber Posture

CVE-2024-13891

HighPublic PoC

Published: 13 March 2025

Published
13 March 2025
Modified
29 April 2025
KEV Added
Patch
CVSS Score 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
EPSS Score 0.0014 33.0th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Description

Adversaries may abuse various implementations of JavaScript for execution.

Security Summary

CVE-2024-13891 is a reflected cross-site scripting (XSS) vulnerability, classified under CWE-79, affecting the Schedule WordPress plugin in versions through 1.0.0. The plugin fails to sanitize and escape a parameter before outputting it back in the page, enabling malicious script injection. It 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), indicating high severity due to network accessibility and scope change.

An unauthenticated attacker can exploit this vulnerability remotely by tricking a targeted user, such as a high-privilege administrator, into interacting with a maliciously crafted link or input. Successful exploitation executes arbitrary JavaScript in the victim's browser context, potentially allowing session hijacking, data theft, or further site compromise, with low impacts on confidentiality, integrity, and availability.

Mitigation details are available in the WPScan advisory at https://wpscan.com/vulnerability/58c8b73c-3a29-4a66-9b2e-f24b5c2769ac/.

Details

CWE(s)
CWE-79

Affected Products

scheduler
schedule
1.0.0

MITRE ATT&CK Enterprise Techniques

T1204.001 Malicious Link Execution
An adversary may rely upon a user clicking a malicious link in order to gain execution.
T1059.007 JavaScript Execution
Adversaries may abuse various implementations of JavaScript for execution.
Why these techniques?

Reflected XSS enables arbitrary JavaScript execution in browser via malicious crafted link, directly mapping to user execution through malicious link and JavaScript scripting.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

References