Vulnerability report

Exploitation attempts observed Confirmed confidence In CISA KEV

CVE-2017-9822

DotNetNuke CMS Fixed in 9.1.1 DNN before 9.1.1 has Remote Code Execution

DotNetNuke CMS Fixed in 9.1.1 · DotNetNuke CMS Fixed in 9.1.1

Watch CVE-2017-9822 Browse KEV feed
Severity
CVSS 8.8 · High
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
94.8%
First observed
12 Jun 2026
Last observed
25 Oct 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2017-9822 is a vulnerability affecting DotNetNuke CMS Fixed in 9.1.1. DNN (aka DotNetNuke) before 9.1.1 has Remote Code Execution via a cookie, aka "2017-08 (Critical) Possible remote code execution on DNN sites."

Have exploitation attempts been observed?

Yes. Previdian sensors observed exploitation attempts targeting this vulnerability. Listed in CISA KEV. Confidence is confirmed.

Who is affected?

DotNetNuke CMS Fixed in 9.1.1 dotnetnuke cms fixed in 9.1.1.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

DotNetNuke CMS Fixed in 9.1.1 DNN before 9.1.1 has Remote Code Execution

DNN (aka DotNetNuke) before 9.1.1 has Remote Code Execution via a cookie, aka "2017-08 (Critical) Possible remote code execution on DNN sites."

DotNetNuke Affected
DotNetNuke CMS Fixed in 9.1.1
DotNetNuke CMS Fixed in 9.1.1
Published
20 Jul 2017
Exploitation Attempts Reported
03 Nov 2021
Attack vector
Remote
Complexity
Low
Privileges
Low
User interaction
None

Tags

ransomware cisa malware dotnet nuclei_scanner metasploit metasploit_scanner

CVE References

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation attempts observed in the wild

CISA

Recorded 03 Nov 2021

A trusted third party reported exploitation attempts.

Exploitation attempts observed

Previdian sensor

First observed 27 Jun 2026

Previdian sensors observed exploitation attempts targeting this vulnerability.

Targeted by malware-related exploitation attempts

CISA

Recorded 03 Nov 2021

Exploitation attempts against this vulnerability are associated with malware-related payloads.

Proof of concept available

GitHub

Recorded 28 Aug 2020

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

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Source Added
CISA First 2021-11-03 00:00 UTC
Previdian Sensors 2026-07-23 09:59 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Previdian sensors recorded exploitation attempts targeting this vulnerability. The cards and chart show volume, unique attackers, and daily activity.

67

Attempts observed

19

Unique attacker IPs

10

Attacker countries

BG · CH · FI · FR · JP · NL · SC · SG · US · YE

23

Sensors observed

CVE-2017-9822 exploitation attempts over the last 68 days

Daily events observed by Previdian sensors

Updated 25 Oct 2026

0
1
0
0
0
0
3
4
2
1
0
2
0
0
0
0
0
0
0
0
0
3
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
2
0
2
3
1
3
0
6
7
2
1
0
5
6
2
1
1
0
0
0
0
1
2
0
0
0
0
0
4
19 Aug 2 Sep 16 Sep 30 Sep 25 Oct

First observed 12 Jun 2026 · Last observed 25 Oct 2026

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
1
45
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Metasploit https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/dnn_cookie_deserialization_rce.rb 28 Apr 2025
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2017/CVE-2017-9822.yaml 25 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

8.8 High

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

94.8%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Improper Control of Generation of Code ('Code Injection') CWE-94

All CVSS Scores

CVSS v3.1 8.8 High

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

CVSS v2.0 6.5 Medium

AV:N/AC:L/Au:S/C:P/I:P/A:P

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

DotNetNuke 5.0.0 - 9.3.0 - Cookie Deserialization Remote Code Execution

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation attempts

  1. 09:33 UTC

    Indicators of compromise added (58)

    Indicators of compromise recorded

  2. 09:33 UTC

    Observed by Previdian sensors

    Previdian sensors observed exploitation attempts targeting this vulnerability.

  3. 14:20 UTC

    Public PoC available

    Public proof-of-concept code published

  4. 15:02 UTC

    Metasploit module available

    Exploit module available

  5. 00:00 UTC

    Nuclei template available

    Scanner coverage available

  6. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  7. 00:00 UTC

    Targeted by malware-related exploitation attempts

    Malware-related exploitation attempts or payloads reported

  8. 12:00 UTC

    CVE published

    Vulnerability disclosed publicly

  9. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2017-9822

Sample API response 
{
  "cve_id": "CVE-2017-9822",
  "confidence": "Confirmed",
  "cvss_score": 8.8,
  "cvss_estimated": false,
  "epss_score": 0.94789,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 67, "sensors": 23 }
}