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CVE-2021-22017

is CVE-2021-22017real, exploitable, or a false positive? Here's the community ground truth.

Medium · CVSS 5.3EPSS 46.7%CISA KEVCWE-23

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization. A malicious actor with network access to port 443 on vCenter Server may exploit this issue to bypass proxy leading to internal endpoints being accessed.

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2 verdicts
Not a real issue

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Community real-world severity: High (High 2) — CVSS base score 5.3

Practitioners rate this higher than its CVSS — treat with extra caution.

Field notes & remediation

Verdicts are the quick signal — notes are the evidence and fixes behind them.

  • 0
    Field note · Nadia PetrovaCurated

    VMware vCenter Server Improper Access Control — Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization. Listed in the CISA KEV catalog (added 2022-01-10) — confirmed exploited in the wild, not theoretical. FIRST EPSS puts the chance of exploitation in the next 30 days at ~47%. Treat it as real and prioritize remediation over triage.

  • 0
    Remediation · Aisha RahmanCurated

    Required action for VMware vCenter Server: Apply updates per vendor instructions. CISA set a federal remediation due date of 2022-01-24. After patching, verify the vulnerable path is no longer reachable before closing the finding.

Same weaknessCWE-23.