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Not in CISA KEV
HIGH severity

CVE-2015-0899 — struts-core

HIGH

CVE-2015-0899 is a high-severity (CVSS 7.5) Improper Input Validation vulnerability in org.apache.struts:struts-core. EPSS puts its 30-day exploitation probability at 21.3% (98th percentile). The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Improper Input Validation in Apache Struts

Published
Updated
Affected
2 pkgs
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
21.3%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs98th percentile — riskier than 98% of all scored CVEsHighest risk
6.80%32.5%58.2%83.9%69.5%21.3%May 26Sep 26Nov 26

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
☕org.apache.struts:struts-core☕struts:struts

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 MultiPageValidator implementation in Apache Struts 1 1.1 through 1.3.10 allows remote attackers to bypass intended access restrictions via a modified page parameter.

Affected Packages

2 total
EcosystemPackageVulnerable rangeFix
☕Mavenorg.apache.struts:struts-core≥ 1.1No fix
☕Mavenstruts:struts≥ 1.1No fix

Affected Products

1 product · 17 configurations
Application
strutsapache
12 versions
1.01.0.21.11.2.21.2.41.2.61.2.71.2.81.2.91.3.51.3.81.3.10

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Remediation status

    The records we use list no patched version of org.apache.struts:struts-core for CVE-2015-0899. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    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

The MultiPageValidator implementation in Apache Struts 1 1.1 through 1.3.10 allows remote attackers to bypass intended access restrictions via a modified page parameter.
O3 Security · Impact-Aware SCA

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CVE-2015-0899: struts-core (High 7.5)