CVE-2021-36888

CVE-2021-36888 is a critical-severity vulnerability in Blocksera Image Hover Effects with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Description

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

Frequently asked questions

What is CVE-2021-36888?
Unauthenticated Arbitrary Options Update vulnerability leading to full website compromise discovered in Image Hover Effects Ultimate (versions <= 9.6.1) WordPress plugin.
How severe is CVE-2021-36888?
CVE-2021-36888 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-36888 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36888?
CVE-2021-36888 affects Blocksera Image Hover Effects. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36888?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-36888 published?
CVE-2021-36888 was published on 2021-12-15 and last updated on 2026-06-17.

References

Affected products (1)

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