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Not in CISA KEV
CRITICAL severity

CVE-2021-36711 — octobot

CRITICAL

CVE-2021-36711 is a critical-severity (CVSS 9.8) Unrestricted File Upload vulnerability in octobot. 4 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for octobot — see the affected versions and patch details below.

Octobot mishandles Tentacles upload

Also known asGHSA-fr75-x856-q6j8PYSEC-2022-235
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
4 known
Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
16.6%probability of exploitation in next 30 days
Moderate Risk+0.45%
Lower risk than most CVEs97th percentile — riskier than 97% of all scored CVEsHighest risk
0.84%20.8%40.8%60.8%49.5%16.6%May 26Aug 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

1 pkg affected
🐍octobot

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

WebInterface in OctoBot before 0.4.4 allows remote code execution because Tentacles upload is mishandled.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIoctobotall versions0.4.4pip install --upgrade 'octobot==0.4.4'

Affected Products

1 product · 1 configurations
Application
octobotoctobot
< 0.4.4
range
Exploits & PoCs
4

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

EDB-50979webappsmultiple

OctoBot WebInterface 0.4.3 - Remote Code Execution (RCE)

by Samy Younsi · Jul 21, 2022

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update octobot to 0.4.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-36711 is resolved across your whole dependency graph.

  3. Workarounds

    Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve.

Frequently Asked Questions

WebInterface in OctoBot before 0.4.4 allows remote code execution because Tentacles upload is mishandled.
O3 Security · Impact-Aware SCA

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CVE-2021-36711: octobot RCE — Fixed in 0.4.4