CVE-2026-33647: WWBN AVideo · Unrestricted File Upload
Affects WWBN AVideoSource CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 29 Oct 2026, 19:04 UTC
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 23 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| WWBNAVideo | Affected
| Fixed in– |
GitHubwwbn/AVideopkg:github/wwbn/AVideoOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
- Immediately apply the official patch referenced by commit 345a8d3ece0ad1e1b71a704c1579cbf885d8f3ae to all affected AVideo installations.
- Implement strict server-side validation of uploaded file extensions against a whitelist of allowed types, ensuring the extension matches the MIME type.
- Sanitize and normalize filenames before saving to prevent injection of dangerous extensions.
- Configure the web server to disallow execution of scripts in upload directories, for example, by disabling PHP execution in those folders via .htaccess or server configuration.
- Employ Content Security Policy (CSP) headers and other web application firewalls (WAF) to detect and block suspicious upload attempts.
- Monitor logs for unusual file uploads or access patterns to detect exploitation attempts early.
- Educate developers and administrators on secure file upload handling best practices to prevent similar vulnerabilities.
- Consider isolating the upload directory in a sandboxed environment with minimal privileges to limit impact if exploitation occurs.
Description
CVE-2026-33647 is a high-severity vulnerability in WWBN AVideo versions up to 26.0 that allows remote code execution via unrestricted upload of a file with a dangerous extension. The vulnerability arises because the application validates uploaded file content using MIME type detection but does not enforce an allowlist on the file extension derived from the user-supplied filename. Attackers can upload a crafted polyglot file containing valid JPEG headers followed by embedded PHP code with a . php extension. Since the MIME check passes, the file is saved as an executable PHP script in a web-accessible directory, enabling execution of arbitrary code on the server. No user interaction is required beyond file upload, and the exploit requires low privileges. A patch addressing this issue has been committed. Organizations running vulnerable versions should apply the patch immediately and implement stricter file extension validation to prevent exploitation.