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Public proof of conceptFix available

CVE-2021-36711

A public proof of concept exists; no exploitation attested.

  • Published2022-07-16
  • Fixed in0.4.4
  • WeaknessCWE-434

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2022-07-21Exploit-DB entryExploit-DB

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-36711?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-36711?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Octobot
BranchAffectedFixed in
0.4< 0.4.40.4.4

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Octobot to 0.4.4

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-50979
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-07-16
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-fr75-x856-q6j8

Frequently asked questions

What is CVE-2021-36711?

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

Is CVE-2021-36711 actively exploited?

Active exploitation of CVE-2021-36711 has not been confirmed. Its EPSS score was 16.6% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-36711?

CVE-2021-36711 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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Sources for this record