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Not in CISA KEV
MEDIUM severity

CVE-2016-7136 — plone

MEDIUM

CVE-2016-7136 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in plone. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Plone XSS

Also known asGHSA-22jm-p2vv-j2hcPYSEC-2017-59
Published
Updated
Affected
2 pkgs
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 25, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs75th percentile — riskier than 75% of all scored CVEsHighest risk
0.00%0.70%1.39%2.09%0.5%1.6%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

2 pkgs affected
🐍plone🐍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

z3c.form in Plone CMS 5.x through 5.0.6 and 4.x through 4.3.11 allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted GET request.

Affected Packages

2 total
EcosystemPackageVulnerable rangeFix
🐍PyPIplone≥ 5.0.0No fix
🐍PyPIplone≥ 4.0.0No fix

Affected Products

1 product · 49 configurations
Application
ploneplone
45 versions
4.04.0.14.0.24.0.34.0.44.0.54.0.74.0.84.0.94.0.104.14.1.1
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

z3c.form in Plone CMS 5.x through 5.0.6 and 4.x through 4.3.11 allows re…

packetstormsecurity.comNVDOct 2018

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. Remediation status

    The records we use list no patched version of plone for CVE-2016-7136. 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

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

z3c.form in Plone CMS 5.x through 5.0.6 and 4.x through 4.3.11 allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted GET request.
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CVE-2016-7136: plone XSS (Medium 6.1)