How severe is CVE-2011-3587?

No CVSS score has been assigned to CVE-2011-3587 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2011-3587?

CVE-2011-3587 affects the following packages: zope2 (PyPI), zope2 (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2011-3587?

Update zope2 to 2.12.20 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-3587 is resolved across your whole dependency graph.

How do I detect CVE-2011-3587 in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zope2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2011-3587 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.

How does O3 Security protect against CVE-2011-3587?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2011-3587 can be triaged on real exposure rather than presence alone.

Is CVE-2011-3587 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2011-3587, including 1 documented proof-of-concept exploit on Exploit-DB and 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2011-3587?

CVE-2011-3587 has an EPSS (Exploit Prediction Scoring System) score of 78.1%, placing it in the 100th 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. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

When was CVE-2011-3587 published, and has it been updated?

CVE-2011-3587 was published on May 17, 2022 and was last updated on July 7, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍 PyPI

Not in CISA KEV

CVE-2011-3587 — zope2

Fix: zopefoundation/Zope@491a583

CVE-2011-3587 is a security vulnerability in zope2. 2 public exploit references exist, so weaponization risk is real. A fix is available for zope2 — see the affected versions and patch details below.

Zope Command Execution Vulnerability

Also known asPYSEC-2026-1067

Published

May 17, 2022

Updated

Jul 7, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

2 known

Exploitation data as of Sep 17, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

78.1%probability of exploitation in next 30 days

Very High Risk0.00%

Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

2 pkgs affected

🐍zope2🐍zope2

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

Unspecified vulnerability in Zope 2.12.x and 2.13.x, as used in Plone 4.0.x through 4.0.9, 4.1, and 4.2 through 4.2a2, allows remote attackers to execute arbitrary commands via vectors related to the p_ class in OFS/misc_.py and the use of Python modules.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`zope2`	≥ 2.12.0&&< 2.12.20	2.12.20`pip install --upgrade 'zope2==2.12.20'`
🐍PyPI	`zope2`	≥ 2.13.0&&< 2.13.10	2.13.10`pip install --upgrade 'zope2==2.13.10'`

Exploits & PoCs

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

EDB-18262webappsmultiple✓ Verified

Plone and Zope - Remote Command Execution

by Nick Miles · Dec 21, 2011

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zope2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update zope2 to 2.12.20 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-3587 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.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2011-3587 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2011-3587. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Unspecified vulnerability in Zope 2.12.x and 2.13.x, as used in Plone 4.0.x through 4.0.9, 4.1, and 4.2 through 4.2a2, allows remote attackers to execute arbitrary commands via vectors related to the `p_` class in `OFS/misc_.py` and the use of Python modules.

O3 Security · Impact-Aware SCA

Is CVE-2011-3587 in your dependencies?

O3 Security finds CVE-2011-3587 across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works