Advance Guest Post Plugin up to 1.9 on WordPress unrestricted upload

Summaryinfo

A vulnerability described as critical has been identified in Advance Guest Post Plugin up to 1.9. This issue affects some unknown processing. Such manipulation leads to unrestricted upload. This vulnerability is documented as CVE-2026-118064. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Advance Guest Post Plugin up to 1.9. It has been rated as critical. Affected by this issue is an unknown code block. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the upload or transfer of dangerous file types that are automatically processed within its environment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Advance Guest Post WordPress plugin through 1.9 does not properly restrict or validate file uploads, authorizing an upload action with a nonce exposed to every front-end visitor and checking only a file's leading bytes, allowing unauthenticated users to upload arbitrary PHP files and execute code remotely. Successful exploitation additionally requires the target to run PHP 7.x; on PHP 8.0 and later the vulnerable code path raises a fatal error before the file is written.

The advisory is shared for download at wpscan.com. This vulnerability is handled as CVE-2026-118064 since 10/27/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/13/2026). The MITRE ATT&CK project declares the attack technique as T1608.002.

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

Name

• Advance Guest Post Plugin

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9

CPE 2.3info

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CPE 2.2info

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