How severe is CVE-2016-20010?

CVE-2016-20010 has a CVSS 3.x base score of 10.0, 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-2016-20010 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-20010?

CVE-2016-20010 affects Ewww Image Optimizer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-20010?

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-2016-20010 published?

CVE-2016-20010 was published on 2021-05-05 and last updated on 2026-06-17.

CVE-2016-20010

CVE-2016-20010 is a critical-severity vulnerability in Ewww Image Optimizer with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
CVSS v2: 7.5
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ewww Image Optimizer
Published: 2021-05-05
Last modified: 2026-06-17

Description

EWWW Image Optimizer before 2.8.5 allows remote command execution because it relies on a protection mechanism involving boolval, which is unavailable before PHP 5.5.

Frequently asked questions

What is CVE-2016-20010?: EWWW Image Optimizer before 2.8.5 allows remote command execution because it relies on a protection mechanism involving boolval, which is unavailable before PHP 5.5.
How severe is CVE-2016-20010?: CVE-2016-20010 has a CVSS 3.x base score of 10.0, 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-2016-20010 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-20010?: CVE-2016-20010 affects Ewww Image Optimizer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-20010?: 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-2016-20010 published?: CVE-2016-20010 was published on 2021-05-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ewww:image_optimizer:*:*:*:*:*:wordpress:*:*

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