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🐍
🐍 PyPI
Not in CISA KEV
HIGH severity

CVE-2015-7318 — plone

HIGH

CVE-2015-7318 is a high-severity (CVSS 7.5) Improper Input Validation vulnerability in plone. A fix is available for plone — see the affected versions and patch details below.

Plone Header Injection

Also known asPYSEC-2017-54
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 27, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.7%probability of exploitation in next 30 days
Lower Risk+0.07%
Lower risk than most CVEs78th percentile — riskier than 78% of all scored CVEsHighest risk
0.00%0.75%1.50%2.25%0.4%1.7%Apr 26Aug 26Oct 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

1 pkg affected
🐍plone

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

Description

Plone 3.3.0 through 3.3.6 allows remote attackers to inject headers into HTTP responses.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIplone≥ 3.3&&< 4.0a14.0a1pip install --upgrade 'plone==4.0a1'

Affected Products

1 product · 7 configurations
Application
ploneplone
7 versions
3.33.3.13.3.23.3.33.3.43.3.53.3.6

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update plone to 4.0a1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-7318 is resolved across your whole dependency graph.

  3. 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

Plone 3.3.0 through 3.3.6 allows remote attackers to inject headers into HTTP responses.
O3 Security · Impact-Aware SCA

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CVE-2015-7318: plone — Fixed in 4.0a1