yourownprogrammer YOP Poll Plugin up to 7.0.10 on WordPress postMessage origin validation

Summaryinfo

A vulnerability, which was classified as critical, has been found in yourownprogrammer YOP Poll Plugin up to 7.0.10. The affected element is the function postMessage. Performing a manipulation results in origin validation. This vulnerability is known as CVE-2026-85682. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in yourownprogrammer YOP Poll Plugin up to 7.0.10. This affects the function postMessage. The manipulation with an unknown input leads to a origin validation vulnerability. CWE is classifying the issue as CWE-346. The product does not properly verify that the source of data or communication is valid. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The YOP Poll plugin for WordPress is vulnerable to Origin Validation Error in all versions up to, and including, 7.0.10. This is due to the plugin transmitting a wp_rest nonce to window.opener via postMessage() with a wildcard targetOrigin. This makes it possible for unauthenticated attackers to steal a REST nonce scoped to a logged-in Administrator and use it to change the Administrator's email address and password, resulting in full account takeover. The Administrator must open an attacker-controlled page in order to exploit this vulnerability.

The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-85682 since 09/04/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/24/2026).

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• yourownprogrammer

Name

• YOP Poll Plugin

Version

• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.0.9
• 7.0.10

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

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Exploitinginfo

Threat Intelligenceinfo

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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