Advance Guest Post Plugin up to 1.9 on WordPress unrestricted upload

Summaryinfo

A vulnerability, which was classified as critical, has been found in Advance Guest Post Plugin up to 1.9. The impacted element is an unknown function. The manipulation leads to unrestricted upload. This vulnerability is traded as CVE-2026-118063. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Advance Guest Post Plugin up to 1.9. This issue affects an unknown functionality. 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. The summary by CVE is:

The Advance Guest Post WordPress plugin through 1.9 does not properly validate uploaded files, relying on a case-sensitive and incomplete extension check that unauthenticated users can trivially bypass, allowing them to upload arbitrary files, including executable PHP variants, into a web-reachable directory, which can lead to remote code execution depending on the server configuration.

It is possible to read the advisory at wpscan.com. The identification of this vulnerability is CVE-2026-118063 since 10/27/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/13/2026). The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

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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