CVE-2024-32533 in LH Add Media From Url Plugin
Summary
by MITRE • 04/17/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Peter Shaw LH Add Media From Url allows Reflected XSS.This issue affects LH Add Media From Url: from n/a through 1.22.
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Analysis
by VulDB Data Team • 04/05/2025
The vulnerability identified as CVE-2024-32533 represents a critical cross-site scripting flaw within the LH Add Media From Url WordPress plugin, specifically impacting versions ranging from n/a through 1.22. This issue falls under the broader category of improper input neutralization during web page generation, creating a significant security risk for WordPress installations that utilize this particular plugin. The vulnerability manifests as a reflected cross-site scripting attack, where malicious payloads are injected into web pages through user-supplied input that is not properly sanitized or escaped before being rendered back to users. The flaw occurs when the plugin fails to adequately process and neutralize potentially malicious input parameters that are reflected back to users within the generated web content.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL containing XSS payloads that are then processed by the LH Add Media From Url plugin. When a victim accesses this specially crafted URL, the malicious script is executed within the victim's browser context, potentially allowing the attacker to steal session cookies, perform unauthorized actions on behalf of the victim, or redirect users to malicious websites. This reflected XSS vulnerability specifically targets the plugin's handling of input parameters that are directly incorporated into the generated HTML output without proper sanitization measures. The vulnerability is particularly concerning because it allows for immediate execution of malicious code upon page load, making it an attractive target for attackers seeking to exploit user sessions or deliver malware.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable sophisticated attack vectors including session hijacking, credential theft, and the potential for privilege escalation within the WordPress environment. Attackers can leverage this vulnerability to create persistent threats against users of affected websites, particularly those with administrative privileges. The reflected nature of the vulnerability means that attackers do not need to store malicious payloads on the server, instead relying on social engineering to convince victims to click malicious links. This makes the attack surface particularly broad and difficult to monitor effectively, as the malicious code is delivered through legitimate website functionality rather than through direct server compromise. The vulnerability also aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and maps to ATT&CK technique T1566.001 for the initial access phase of attacks involving phishing or malicious links.
Mitigation strategies for CVE-2024-32533 should prioritize immediate plugin updates to versions that address the reflected XSS vulnerability, as this represents the most direct and effective solution. Organizations should implement comprehensive input validation and output escaping mechanisms throughout their web applications to prevent similar vulnerabilities from occurring in other components. Security teams should conduct thorough vulnerability assessments of all installed WordPress plugins to identify potential cross-site scripting flaws and ensure proper sanitization of user inputs. Additionally, implementing content security policies, regular security monitoring, and maintaining up-to-date security patches across all web applications forms essential defensive measures against this class of vulnerability. The remediation process should include verification that the updated plugin properly handles all input parameters and that no other similar vulnerabilities exist within the affected codebase.