How severe is CVE-2015-1831?

CVE-2015-1831 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2015-1831 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-1831?

CVE-2015-1831 affects Apache Struts. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-1831?

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-2015-1831 published?

CVE-2015-1831 was published on 2015-07-16 and last updated on 2026-06-17.

CVE-2015-1831

CVE-2015-1831 is a high-severity vulnerability in Apache Struts with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apache Struts
Published: 2015-07-16
Last modified: 2026-06-17

Description

The default exclude patterns (excludeParams) in Apache Struts 2.3.20 allow remote attackers to "compromise internal state of an application" via unspecified vectors.

Frequently asked questions

What is CVE-2015-1831?: The default exclude patterns (excludeParams) in Apache Struts 2.3.20 allow remote attackers to "compromise internal state of an application" via unspecified vectors.
How severe is CVE-2015-1831?: CVE-2015-1831 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2015-1831 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-1831?: CVE-2015-1831 affects Apache Struts. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-1831?: 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-2015-1831 published?: CVE-2015-1831 was published on 2015-07-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:struts:2.3.20:*:*:*:*:*:*:*

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