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CVE-2021-36888

WordPress Image Hover Effects Ultimate plugin <= 9.6.1 - Unauthenticated Arbitrary Options Update leading to full website compromise

9.8 Critical

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

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

6.53%Up 5.9 points since Dec 16, 2021
90%50%10%1%

What each source reports

CVE List Score used 9.8

WordPress Image Hover Effects Ultimate plugin <= 9.6.1 - Unauthenticated Arbitrary Options Update leading to full website compromise

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

Record
CVE-2021-36888
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-284
Updated
2026-11-02
EUVDEUVD-2021-23464 9.8

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

Record
EUVD-2021-23464
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-8fjw-gv37-439q 9.8

Unauthenticated Arbitrary Options Update vulnerability leading to full website compromise...

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

Record
GHSA-8fjw-gv37-439q
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-306, CWE-862
Updated
2026-11-02
NVD 9.8

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

Record
CVE-2021-36888
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-284, CWE-306
Updated
2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
NucleiWordPress Image Hover Ultimate - Unauthenticated Settings Update

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, Nuclei, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-36888 is a critical vulnerability (CVSS 9.8) in Blocksera Image Hover Effects, published December 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 6.53%, the 93rd percentile. No source names a fixed version.

References

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