WWBN AVideo up to 29.0 Endpoint sendEmail.json.php sendTo verification of source

Summaryinfo

A vulnerability has been found in WWBN AVideo up to 29.0 and classified as problematic. The impacted element is an unknown function of the file objects/sendEmail.json.php of the component Endpoint. The manipulation of the argument sendTo leads to verification of source. This vulnerability is uniquely identified as CVE-2026-43880. The attack is possible to be carried out remotely. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in WWBN AVideo up to 29.0. It has been rated as problematic. This issue affects an unknown part of the file objects/sendEmail.json.php of the component Endpoint. The manipulation of the argument sendTo with an unknown input leads to a verification of source vulnerability. Using CWE to declare the problem leads to CWE-940. The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin. Impacted is integrity. The summary by CVE is:

WWBN AVideo is an open source video platform. In versions up to and including 29.0, objects/sendEmail.json.php exposes two branches depending on whether contactForm=1 is submitted. When the parameter is omitted, the endpoint sets $sendTo to an attacker-supplied email and, for unauthenticated callers, uses the site's own contact email as the message From:/Reply-To:. The endpoint is explicitly allow-listed as a "public write action" in objects/functionsSecurity.php (line 885), so it requires no authentication or CSRF token. An unauthenticated attacker (solving a captcha) can force the site's own SMTP infrastructure to send attacker-composed emails to arbitrary recipients with the site's legitimate sender address, passing SPF/DKIM/DMARC for the site's domain — ideal for targeted phishing and brand impersonation. Commit 4e3709895857a5857f0edb46b0ee984de0d9e1a2 contains an updated fix.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-43880 since 05/04/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

By approaching the search of inurl:objects/sendEmail.json.php it is possible to find vulnerable targets with Google Hacking.

Applying the patch 4e3709895857a5857f0edb46b0ee984de0d9e1a2 is able to eliminate this problem. The bugfix is ready for download at github.com.

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

Productinfo

Vendor

• WWBN

Name

• AVideo

Version

• 29.0

License

• open-source

Website

• Product: https://github.com/WWBN/AVideo/

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

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