Addify Request a Quote Plugin up to 2.9.2 on WordPress Popup Upload afrfq_submit_quote_via_popup unrestricted upload

Summaryinfo

A vulnerability was found in Addify Request a Quote Plugin up to 2.9.2. It has been classified as critical. This vulnerability affects the function afrfq_submit_quote_via_popup of the component Popup Upload Handler. This manipulation causes unrestricted upload. This vulnerability is handled as CVE-2026-18143. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Addify Request a Quote Plugin up to 2.9.2 and classified as critical. Affected by this vulnerability is the function afrfq_submit_quote_via_popup of the component Popup Upload Handler. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The Request a Quote for WooCommerce plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.9.2 via the `afrfq_submit_quote_via_popup()` function. This is due to missing file extension and MIME type validation in the popup upload handler, which uses the raw attacker-supplied filename directly as the destination for `move_uploaded_file()`. This makes it possible for unauthenticated attackers to upload executable files, such as PHP files, to a web-accessible temporary RFQ upload directory when a public quote rule with the multi-page popup flow is enabled.

It is possible to read the advisory at wordfence.com. This vulnerability is known as CVE-2026-18143 since 07/28/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/26/2026). 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.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• Addify

Name

• Request a Quote Plugin

Version

• 2.9.0
• 2.9.1
• 2.9.2

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion