How severe is CVE-2016-4433?

CVE-2016-4433 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2016-4433 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4433?

CVE-2016-4433 primarily affects Apache Struts. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-4433?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-4433 published?

CVE-2016-4433 was published on 2016-07-04 and last updated on 2026-06-17.

CVE-2016-4433

CVE-2016-4433 is a high-severity vulnerability in Apache Struts with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 10% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apache Struts
Published: 2016-07-04
Last modified: 2026-06-17

Description

Apache Struts 2 2.3.20 through 2.3.28.1 allows remote attackers to bypass intended access restrictions and conduct redirection attacks via a crafted request.

Frequently asked questions

What is CVE-2016-4433?: Apache Struts 2 2.3.20 through 2.3.28.1 allows remote attackers to bypass intended access restrictions and conduct redirection attacks via a crafted request.
How severe is CVE-2016-4433?: CVE-2016-4433 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2016-4433 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4433?: CVE-2016-4433 primarily affects Apache Struts. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-4433?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-4433 published?: CVE-2016-4433 was published on 2016-07-04 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:apache:struts:2.3.20:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.20.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.20.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.24:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.24.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.24.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.28:*:*:*:*:*:*:*

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