CVE-2021-36711

Status: ModifiedCritical (9.8)—Exploit

Severity9.8Critical · CVSS 3.1

Exploitation probability17 %higher than 97% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB

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

CVSS

Base score: 9.8
Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 17 %
Percentile among all scored CVEs: 97
Score date: 10/23/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · OctoBot WebInterface 0.4.3 - Remote Code Execution (RCE) (7/21/2022)

Affected technologies (1)

Octobot — Octobot

CWEs

CWE-434

References

Show 12 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2021-36711",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-07-16T17:15:08.440",
  "references": [
    {
      "url": "http://packetstormsecurity.com/files/167780/OctoBot-WebInterface-0.4.3-Remote-Code-Execution.html",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/Drakkar-Software/OctoBot/blob/master/CHANGELOG.md",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/Drakkar-Software/OctoBot/issues/1966",
      "tags": [
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        "Third Party Advisory"
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/Nwqda/Sashimi-Evil-OctoBot-Tentacle",
      "tags": [
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        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
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      "tags": [
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        "VDB Entry"
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.octobot.online/",
      "tags": [
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      "source": "cve@mitre.org"
    },
    {
      "url": "http://packetstormsecurity.com/files/167780/OctoBot-WebInterface-0.4.3-Remote-Code-Execution.html",
      "tags": [
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      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/Drakkar-Software/OctoBot/blob/master/CHANGELOG.md",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/Drakkar-Software/OctoBot/issues/1966",
      "tags": [
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        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/Nwqda/Sashimi-Evil-OctoBot-Tentacle",
      "tags": [
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        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://packetstormsecurity.com/files/167721/Sashimi-Evil-OctoBot-Tentacle.html",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.octobot.online/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "WebInterface in OctoBot before 0.4.4 allows remote code execution because Tentacles upload is mishandled."
    },
    {
      "lang": "es",
      "value": "WebInterface en OctoBot versiones anteriores a 0.4.4, permite una ejecución de código remota porque la carga de Tentacles es manejada inapropiadamente"
    }
  ],
  "lastModified": "2026-06-17T03:59:02.063",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:octobot:octobot:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "21346162-74C9-47AB-8AEF-48F306862DBC",
              "versionEndExcluding": "0.4.4"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}