CVE-2026-43880 Details
Description
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.
A vulnerability in WWBN AVideo versions through 29.0 allows unauthenticated users to send emails from the site's legitimate contact address to any recipient. This is achieved by exploiting the objects/sendEmail.json.php endpoint, which is publicly accessible and requires no authentication or CSRF token. When the contactForm parameter is omitted, the endpoint uses the site's contact email as the reply-to address, enabling phishing attacks that bypass email authentication checks. The vulnerability takes advantage of the site's SMTP infrastructure, allowing attacker-controlled messages to be sent while appearing to come from a trusted source.
The vulnerability has been patched in commit 4e37098. Users should update to the latest version of AVideo to address this issue.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 11, 2026CISA-ADP
Assessed May 12, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/WWBN/AVideo/security/advisories/GHSA-5hgj-7gm9-cff5 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/WWBN/AVideo/commit/4e3709895857a5857f0edb46b0ee984de0d9e1a2 | [email protected] | Source CodeVendor |
| https://github.com/WWBN/AVideo/security/advisories/GHSA-5hgj-7gm9-cff5 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-940 | Improper Verification of Source of a Communication Channel | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| WWBN AVideo | <= 29.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 12, 2026 | CVE Modified | CISA-ADP |
| May 11, 2026 | New CVE Received | [email protected] |