How severe is CVE-2016-1182?

CVE-2016-1182 has a CVSS 3.x base score of 8.2, 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 low, and availability high.

Is CVE-2016-1182 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 26% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1182?

CVE-2016-1182 primarily affects Apache Struts. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1182?

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-2016-1182 published?

CVE-2016-1182 was published on 2016-07-04 and last updated on 2026-06-17.

CVE-2016-1182

CVE-2016-1182 is a high-severity vulnerability in Apache Struts with a CVSS 3.x base score of 8.2. Its EPSS exploit-prediction score of 26% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 8.2)
CVSS v2: 6.4
EPSS exploit prediction: 26% (98th 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

ActionServlet.java in Apache Struts 1 1.x through 1.3.10 does not properly restrict the Validator configuration, which allows remote attackers to conduct cross-site scripting (XSS) attacks or cause a denial of service via crafted input, a related issue to CVE-2015-0899.

Frequently asked questions

What is CVE-2016-1182?: ActionServlet.java in Apache Struts 1 1.x through 1.3.10 does not properly restrict the Validator configuration, which allows remote attackers to conduct cross-site scripting (XSS) attacks or cause a denial of service via crafted input, a related issue to CVE-2015-0899.
How severe is CVE-2016-1182?: CVE-2016-1182 has a CVSS 3.x base score of 8.2, 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 low, and availability high.
Is CVE-2016-1182 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 26% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1182?: CVE-2016-1182 primarily affects Apache Struts. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1182?: 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-2016-1182 published?: CVE-2016-1182 was published on 2016-07-04 and last updated on 2026-06-17.

References

Affected products (28)

cpe:2.3:a:apache:struts:1.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.0:beta1:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.0:beta2:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.0:beta3:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.1:b1:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.1:b2:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.1:b3:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.1:rc1:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.1:rc2:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.2.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.2.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.2.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.2.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.2.8:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.2.9:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.3.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.3.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.3.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.3.8:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.3.9:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:1.3.10:*:*:*:*:*:*:*

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