qriouslad Debug Log Manager Plugin up to 2.5.0 on WordPress AJAX log_js_errors pageUrl neutralization for logs

Summaryinfo

A vulnerability labeled as critical has been found in qriouslad Debug Log Manager Plugin up to 2.5.0 on WordPress. Affected by this vulnerability is the function log_js_errors of the component AJAX Handler. Such manipulation of the argument pageUrl leads to neutralization for logs. This vulnerability is referenced as CVE-2026-9016. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in qriouslad Debug Log Manager Plugin up to 2.5.0 on WordPress and classified as critical. Affected by this issue is the function log_js_errors of the component AJAX Handler. The manipulation of the argument pageUrl with an unknown input leads to a neutralization for logs vulnerability. Using CWE to declare the problem leads to CWE-117. The product does not neutralize or incorrectly neutralizes output that is written to logs. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Debug Log Manager – Conveniently Monitor and Inspect Errors plugin for WordPress is vulnerable to Improper Output Neutralization for Logs in all versions up to, and including, 2.5.0. This is due to the `log_js_errors()` AJAX handler being registered for unauthenticated users via `wp_ajax_nopriv_log_js_errors` and gated only by a nonce that is publicly disclosed in every front-end page's HTML through `wp_localize_script()` whenever JavaScript error logging is enabled, providing no real authorization barrier. This makes it possible for unauthenticated attackers to inject arbitrary forged entries into the site's WordPress debug log by supplying attacker-controlled values for the `message`, `script`, `lineNo`, `columnNo`, and `pageUrl` fields — enabling spoofing of error and incident records, obscuring malicious activity within fabricated log noise, and misleading administrators who rely on the log for triage. This vulnerability is only exploitable when the plugin's JavaScript error logging feature is enabled, as the requisite nonce is only published into the page HTML under that condition.

The weakness was published by Endang Alfarisi. The advisory is available at wordfence.com. This vulnerability is handled as CVE-2026-9016 since 05/19/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 2.4.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-34960). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• qriouslad

Name

• Debug Log Manager Plugin

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5.0

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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