How severe is CVE-2015-1831?

No CVSS score has been assigned to CVE-2015-1831 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2015-1831?

CVE-2015-1831 affects the following packages: org.apache.struts:struts2-core (Maven), org.apache.struts.xwork:xwork-core (Maven). Ecosystems affected: Maven.

How do I fix CVE-2015-1831?

Update org.apache.struts:struts2-core to 2.3.20.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-1831 is resolved across your whole dependency graph.

How do I detect CVE-2015-1831 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.struts:struts2-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2015-1831 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2015-1831 actively exploited in the wild?

No public exploit code has been indexed for CVE-2015-1831 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2015-1831?

CVE-2015-1831 has an EPSS (Exploit Prediction Scoring System) score of 6.3%, placing it in the 94th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

When was CVE-2015-1831 published, and has it been updated?

CVE-2015-1831 was published on May 17, 2022 and was last updated on December 6, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

Not in CISA KEV

CVE-2015-1831 — struts2-core

Fix: apache/struts@d832747

CVE-2015-1831 is a security vulnerability in org.apache.struts:struts2-core. A fix is available for org.apache.struts:struts2-core — see the affected versions and patch details below.

Incomplete exclude pattern in Apache Struts

Published

May 17, 2022

Updated

Dec 6, 2024

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

6.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs94th percentile — riskier than 94% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

2 pkgs affected

☕org.apache.struts:struts2-core☕org.apache.struts.xwork:xwork-core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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. In Struts 2.3.20.1 a better set of exlude patterns was defined.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.struts:struts2-core`	≥ 2.0.0&&< 2.3.20.1	2.3.20.1`org.apache.struts:struts2-core:2.3.20.1`
☕Maven	`org.apache.struts.xwork:xwork-core`	≥ 2.0.0&&< 2.3.20.1	2.3.20.1`org.apache.struts.xwork:xwork-core:2.3.20.1`

Affected Products

1 product · 1 configurations

Application

strutsapache

1 version

2.3.20

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.struts:struts2-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.struts:struts2-core to 2.3.20.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-1831 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2015-1831 in your dependencies?

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