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CVE-2021-36888

CRITICAL 9.8 CVSS 3.1
Published
December 15, 2021
Last modified
June 17, 2026
NVD status
Modified
Reported by
audit@patchstack.com
Weakness
CWE-284, CWE-306
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Unauthenticated Arbitrary Options Update vulnerability leading to full website compromise discovered in Image Hover Effects Ultimate (versions <= 9.6.1) WordPress plugin.

Affected WordPress components

  • Image Hover Effects Ultimate ( Image Gallery, Effects, Lightbox, Comparison & Magnifier ) Plugin · image-hover-effects-ultimate
    Confirmed match Active
    From <= 9.6.1 (including) to 9.6.1 (including)
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Oxilab Image Hover Effects Ultimate (WordPress plugin) — From <= 9.6.1 (including) to 9.6.1 (including)
  • blocksera image_hover_effects — Before 9.6.1

References

  • patchstack.com https://patchstack.com/database/vulnerability/image-hover-effects-ultimate/wordpress-image-hover-effects-ultimate-plugin-9-6-1-unauthenticated-arbitrary-options-update-leading-to-full-website-compromise Third Party Advisory
  • wordpress.org https://wordpress.org/plugins/image-hover-effects-ultimate/#developers Release Notes, Vendor Advisory
  • nvd.nist.gov Official NVD record