deveasel Demi Plugin up to 0.0.7 on WordPress AJAX CleanDir::execute path traversal

Summaryinfo

A vulnerability labeled as critical has been found in deveasel Demi Plugin up to 0.0.7. This affects the function CleanDir::execute of the component AJAX Handler. Such manipulation leads to path traversal. This vulnerability is uniquely identified as CVE-2026-14490. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in deveasel Demi Plugin up to 0.0.7 and classified as critical. Affected by this issue is the function CleanDir::execute of the component AJAX Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity, and availability. CVE summarizes:

The Demi – One Click Demo Import, WP Backup & Site Migration plugin for WordPress is vulnerable to Arbitrary Directory Deletion in all versions up to, and including, 0.0.7. The vulnerability exists because the plugin stores its HMAC signing key and per-step restore token as dotfiles inside a publicly accessible subdirectory of the WordPress uploads folder — without any `.htaccess` or index file protection — and the `demi_restore_step` AJAX handler, registered for unauthenticated callers, explicitly accepts possession of the on-disk signing key as a standalone alternative to WordPress capability and nonce checks; an unauthenticated attacker who retrieves the exposed key can forge a valid signed state envelope to invoke `CleanDir::execute()` with a caller-supplied absolute path that is subject to no allow-list or path-canonicalization check. This makes it possible for unauthenticated attackers to recursively delete arbitrary directories on the server.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-14490 since 07/02/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/28/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• deveasel

Name

• Demi Plugin

Version

• 0.0.1
• 0.0.2
• 0.0.3
• 0.0.4
• 0.0.5
• 0.0.6
• 0.0.7

CPE 2.3info

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CPE 2.2info

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