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CVE-2019-19781: Shitrix

Path Traversal: Is CVE-2019-19781 real, exploitable, or a false positive? Here's the community verdict.

Community verdict: No field verdicts yet. Be the first practitioner to weigh in.

signals

public sources

Exploited in wild
Yes
CISA KEV · Nov 3, 2021
Public exploit
Metasploit +2
Metasploit/EDB/PoC
Base severity
9.8 Critical
CVSS
Exploitation prob.
100%
FIRST EPSS
Weakness
CWE-22 · Path Traversal
CWE

Confirmed exploited in the wild. Patch this first, regardless of the base score.

cisa ssvc

CISA Vulnrichment · assessed

Exploitation
Active
in the wild
Automatable
Yes
at scale
Technical impact
Total
on success

CISA decision, by how critical the affected system is to you:

  • low impact → Attend
  • medium impact → Act
  • high impact → Act

Track: normal patch cycle · Track*: watch closely · Attend: patch sooner · Act: patch now. About SSVC ↗

public exploits

links to sources — we don’t host code

A working exploit is publicly available from a maintained source. Treat this as higher urgency and verify your exposure.

baseline read

auto · not a community verdict

Real — exploited in the wild

CISA confirms active exploitation. Treat scanner hits as true positives unless your specific version or config is unaffected.

Based on CISA KEV

Confirm or dispute →
Affected:Citrix

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

An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0. They allow Directory Traversal.

Published · Added to CISA KEV (677 days after publication)

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timeline

  1. CISA SSVC assessment · exploitation: active
  2. Added to CISA KEV · confirmed exploited in the wild
  3. Added to VulnCheck KEV · reported exploited in the wild
  4. Published by NVD

Score and exploit changes tracked since .

Community ground truth

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In your experience, is this finding real and exploitable?

awaiting field verdicts
Real, but not a risk here
Not a real issue

Curated baseline: TruePositive's read from public sources is Real & exploitable — a starting point, not a community verdict.

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Field notes & remediation

Verdicts are the quick signal. Notes are the evidence and fixes behind them.

  • 0
    Field note · TruePositive EditorialCurated

    A directory traversal flaw in Citrix ADC and Gateway (formerly NetScaler) leads to unauthenticated remote code execution. It was mass-exploited over the 2019 and 2020 holiday period, and it was worse because the patch arrived weeks after the first mitigation, so many appliances stayed exposed.

    Who is affected: Citrix ADC and Gateway on vulnerable firmware.

    Very important: the early mitigation (a responder policy) turned out to be bypassable on some builds, so an appliance that was only mitigated, not patched, may still have been hit.

    Commonly flagged by: Nessus, Qualys, Rapid7.

  • 0
    Remediation · TruePositive EditorialCurated

    Patch the firmware to a fixed version. Do not rely on the early responder-policy mitigation alone, because it was bypassable. Hunt for web shells, commonly dropped under the /netscaler/portal/templates path, and investigate if the appliance was exposed during the mass-exploitation window.

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Same weakness: CWE-22 · Path Traversal.