Reflected Cross-Site Scripting in davidanderson All-In-One Security (AIOS), Security and Firewall for WordPress

The All-In-One Security (AIOS) – Security and Firewall plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'tab' parameter in all versions up to, and including, 5.2.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

• The affected product is davidanderson's All-In-One Security (AIOS), Security and Firewall WordPress plugin, with the supplied record marking the default status as unaffected.
• The affected semver range is from 0 through and including 5.2.5.
• Wordfence identifies 5.2.6 as patched for this issue. The status of later or parallel release branches has not been independently established by the available evidence.

The flaw is in how the plugin handles attacker-controlled data from the tab parameter. The value is not sufficiently sanitized before being returned in page content, and output escaping is also insufficient, allowing a browser to interpret attacker-controlled content as script. The attack requires a network request to a site running the plugin and requires the attacker to trick a user into taking an action such as clicking a crafted link; the attacker does not need to authenticate to the plugin. The available evidence does not identify the exact endpoint, HTML context, or output sink where the value is reflected, and it does not establish any additional configuration prerequisite.

The issue is remotely reachable over the network and does not require attacker authentication. The recorded attack complexity is low, but user interaction is required: the victim must visit a link or take a similar action before the script executes in the browser. The supplied record does not identify a public exploit and does not establish that the vulnerability has not been exploited in the wild. There is no evidence that the attack executes without victim interaction.

The reflected script can execute in a user's browser after the user performs an action directed by the attacker. The practical outcome depends on the user's permissions, the data present in the page, the session state, and browser protections. Because the attacker does not need to authenticate, the issue can be used to target website users rather than only plugin accounts. The available evidence does not establish server-side code execution, persistence, or a direct availability impact.

The flaw allows an attacker to place script content into a website response and execute it in the victim's browser under the site's context. Depending on the victim's session, permissions, accessible data, and browser protections, the possible consequences include reading or modifying data available to the browser or triggering actions on the user's behalf. The lack of attacker authentication lowers the barrier to targeting site users, while the required user interaction limits the attack path. The record does not document a specific data breach, account takeover, or service outage.

1. Update the plugin to exactly 5.2.6, which is identified as the patched release for this issue.
2. Check all production, staging, and cloned sites to ensure that no installation remains in the affected range. Include plugin packages deployed manually or managed outside the normal WordPress update process.
3. If an update cannot be applied, treat deployments in the affected range as exposed and reduce delivery of untrusted links to site users as a precaution. The available evidence does not define a vendor-confirmed temporary mitigation, so these precautions are not a substitute for updating.
4. After updating, verify the installed release on the server and review pre-update logs for suspicious requests using the tab parameter.

1. Inventory WordPress sites running the all-in-one-wp-security-and-firewall plugin and record the installed release for comparison with the affected and patched boundaries in affected_summary.
2. Review proxy, WAF, and access logs for requests reaching plugin functionality with a tab value containing unusual data or apparent markup/script content. This is a precautionary heuristic, not a confirmed indicator of compromise.
3. Review browser, CSP, or endpoint telemetry for script execution after users visit suspicious links associated with the WordPress site.
4. Do not treat the absence of matching log evidence as proof that a system is safe. The available evidence does not provide a precise endpoint, payload pattern, or log signature for reliable scoping.