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CVE-2026-43880— WWBN AVideo: Unauthenticated Arbitrary Email Sending via sendEmail.json.php Allows Phishing from Site's Legitimate From Address

Quick assessment

Affected
WWBN AVideo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WWBN AVideo是WWBN团队的一个由PHP编写的视频平台建站系统。 WWBN AVideo 29.0及之前版本存在安全漏洞，该漏洞源于objects/sendEmail.json.php允许未经验证的攻击者使用站点SMTP基础设施发送任意邮件，可能导致钓鱼攻击和品牌冒充。

CVSS 5.3 · Medium EPSS 0.39% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
WWBN AVideo <= 29.0 affected
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I. Basic Information for CVE-2026-43880

Vulnerability Information
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Vulnerability Title
WWBN AVideo: Unauthenticated Arbitrary Email Sending via sendEmail.json.php Allows Phishing from Site's Legitimate From Address
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通信信道源的不正确验证
Source: CVE Program / CVE List V5
Vulnerability Title
WWBN AVideo 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WWBN AVideo是WWBN团队的一个由PHP编写的视频平台建站系统。 WWBN AVideo 29.0及之前版本存在安全漏洞，该漏洞源于objects/sendEmail.json.php允许未经验证的攻击者使用站点SMTP基础设施发送任意邮件，可能导致钓鱼攻击和品牌冒充。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
WWBN AVideo <= 29.0 -

II. Public POCs for CVE-2026-43880

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III. Intelligence Information for CVE-2026-43880

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Patches & Fixes for CVE-2026-43880 (1)

Vendor Advisories for CVE-2026-43880 (1)

Same Patch Batch · WWBN · 2026-05-11 · 13 CVEs total

CVE-2026-43884 7.7 HIGH WWBN AVideo: SSRF Protection Bypass via HTTP Redirect and DNS Rebinding in isSSRFSafeURL()
CVE-2026-43873 7.5 HIGH WWBN AVideo: Unauthenticated Disclosure of CloneSite `myKey` via Error Echo in `cloneClien
CVE-2026-43874 7.2 HIGH WWBN AVideo: Incomplete Fix for YPTSocket autoEvalCodeOnHTML Strip: Unauthenticated Cross-
CVE-2026-43875 6.8 MEDIUM WWBN AVideo: Password Hash Leaked in MobileManager OAuth Redirect URL Enables Account Take
CVE-2026-43876 6.4 MEDIUM WWBN AVideo: HTML Injection in notifySubscribers.json.php Enables Platform-Branded Phishin
CVE-2026-43878 6.1 MEDIUM WWBN AVideo: Reflected XSS in plugin/Meet/iframe.php via Unescaped `user`/`pass` Parameter
CVE-2026-43879 5.4 MEDIUM WWBN AVideo: Blind SSRF in YPTWallet Donation Webhook via Missing isSSRFSafeURL() Check an
CVE-2026-43877 5.4 MEDIUM WWBN AVideo: CSRF in userSavePhoto.php Allows Cross-Origin Overwrite of Any Logged-in User
CVE-2026-43881 5.3 MEDIUM WWBN AVideo: Unauthenticated User Enumeration in `objects/users.json.php` via `isCompany`
CVE-2026-43882 4.3 MEDIUM WWBN AVideo: Unauthenticated CRLF/ICS Injection in Scheduler downloadICS.php Allows Calend
CVE-2026-43883 4.2 MEDIUM WWBN AVideo: IDOR in PayPalYPT agreementCancel.json.php Allows Any Authenticated User to C
CVE-2026-43885 WWBN AVideo: Exposure of Sensitive Information to an Unauthorized Actor and Missing Author

IV. Related Vulnerabilities

Same product: AVideo
Same vendor: WWBN
Same weakness: CWE-940

V. Comments for CVE-2026-43880

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