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Vulnerabilities

Vulnerability · CVE-2021-36888

blocksera image_hover_effects Improper Access Control

Published Dec 16, 2021 · catalog updated Dec 16, 2021 · blocksera image_hover_effects Improper Access

Patch now

CVE-2021-36888 is in the CISA known-exploited catalog. Confirm blocksera image_hover_effects Improper Access against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (blocksera image_hover_effects Improper Access).
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
6.53%
Remediation
Remediation guidance
Affected products
stated image_hover_effects · vendor blocksera image_hover_effects

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated image_hover_effects<= 9.6.1
  • vendor blocksera image_hover_effectsversion unspecified

How to fix CVE-2021-36888

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-36888 is in the CISA known-exploited catalog. Confirm blocksera image_hover_effects Improper Access against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with <= 9.6.1. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 6.53%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 16, 2021 · VulnCheck KEV

    Detected

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

  2. Dec 16, 2021 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2021-36888

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-36888

    30-day exploitation probability 6.5%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2021-36888

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

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.