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CVE-2021-27103

Server-Side Request Forgery (SSRF) — is CVE-2021-27103real, exploitable, or a false positive? Here's the community ground truth.

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Critical · CVSS 9.8EPSS 11.4%CISA KEVCWE-918 · Server-Side Request Forgery (SSRF)

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

Accellion FTA 9_12_411 and earlier is affected by SSRF via a crafted POST request to wmProgressstat.html. The fixed version is FTA_9_12_416 and later.

References

NVD MITRE CVE.org CISA KEV

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Community ground truth

Community verdict

3 verdicts
Not a real issue

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Community real-world severity: Critical (Critical 3) — CVSS base score 9.8

In line with its CVSS base score.

Field notes & remediation

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

  • 0
    Field note · Hanna BergCurated

    Accellion FTA Server-Side Request Forgery (SSRF) Vulnerability — Accellion FTA contains a server-side request forgery (SSRF) vulnerability exploited via a crafted POST request to wmProgressstat.html. Listed in the CISA KEV catalog (added 2021-11-03) — confirmed exploited in the wild, not theoretical. It is linked to known ransomware campaigns. FIRST EPSS puts the chance of exploitation in the next 30 days at ~11%. Treat it as real and prioritize remediation over triage.

  • 0
    Remediation · Sam WhitakerCurated

    Required action for Accellion FTA: Apply updates per vendor instructions. CISA set a federal remediation due date of 2021-11-17. After patching, verify the vulnerable path is no longer reachable before closing the finding.

Related CVEs

Same weakness — CWE-918 · Server-Side Request Forgery (SSRF).