CVE-2026-43876 — WWBN AVideo is an open source video platform. In versions
CVE-2026-43876 — WWBN AVideo is an open source video platform. In versions up to and including 29.0, objects/notifySubscribers.json.php takes the raw message POST parameter and passes it into sendSiteEmail(), which substitutes it directly into an HTML email template (via str_replace on the {message}
What This Means For You
- If your environment is affected by CWE-79, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-43876 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-43876 - AVideo Arbitrary HTML Injection in notifySubscribers.json.php
title: CVE-2026-43876 - AVideo Arbitrary HTML Injection in notifySubscribers.json.php
id: scw-2026-05-11-ai-1
status: experimental
level: high
description: |
Detects exploitation attempts against CVE-2026-43876 by identifying POST requests to the specific vulnerable endpoint 'objects/notifySubscribers.json.php' in WWBN AVideo. This endpoint is known to be vulnerable to arbitrary HTML injection via the 'message' POST parameter.
author: SCW Feed Engine (AI-generated)
date: 2026-05-11
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-43876/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
uri|endswith:
- '/objects/notifySubscribers.json.php'
cs-method:
- 'POST'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-43876 | vulnerability | CVE-2026-43876 |
| CWE-79 | weakness | CWE-79 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 12, 2026 at 01:22 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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