CVE-2020-8191
published 2020-07-10CVE-2020-8191: Improper input validation in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN…
PriorityP182medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
ITWEXPLOITVulnCheck KEV
Exploited in the wild
EPSS
22.94%
97.5th percentile
Improper input validation in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows reflected Cross Site Scripting (XSS).
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| citrix | application_delivery_controller_firmware | >= 10.5 < 10.5-70.18 | 10.5-70.18 |
| citrix | application_delivery_controller_firmware | >= 11.1 < 11.1-64.14 | 11.1-64.14 |
| citrix | application_delivery_controller_firmware | >= 12.0 < 12.0-63.21 | 12.0-63.21 |
| citrix | application_delivery_controller_firmware | >= 12.1 < 12.1-57.18 | 12.1-57.18 |
| citrix | application_delivery_controller_firmware | >= 13.0 < 13.0-58.30 | 13.0-58.30 |
| citrix | citrix_adc | — | — |
| citrix | citrix_application_delivery_controller | — | — |
| citrix | citrix_gateway | — | — |
| citrix | citrix_sd-wan_wanop | — | — |
| citrix | gateway_firmware | >= 13.0 < 13.0-58.30 | 13.0-58.30 |
| citrix | netscaler_adc | — | — |
| citrix | netscaler_gateway | — | — |
| citrix | netscaler_gateway_firmware | >= 10.5 < 10.5-70.18 | 10.5-70.18 |
| citrix | netscaler_gateway_firmware | >= 11.1 < 11.1-64.14 | 11.1-64.14 |
| citrix | netscaler_gateway_firmware | >= 12.0 < 12.0-63.21 | 12.0-63.21 |
| citrix | netscaler_gateway_firmware | >= 12.1 < 12.1-57.18 | 12.1-57.18 |
| citrix | sd-wan | — | — |
| citrix | sd-wan_wanop | >= 10.2 < 10.2.7 | 10.2.7 |
| citrix | sd-wan_wanop | >= 11.0 < 11.0.3d | 11.0.3d |
| citrix | sd-wan_wanop | >= 11.1 < 11.1.1a | 11.1.1a |
| citrix | xenserver | — | — |
Detection & IOCsextracted from sources · hover to see the quote
url/menu/stapp
commandsid=254&pe=1,2,3,4,5&appname=%0aalert(31337)&au=1&username=nsroot
- →Send a POST request to /menu/stapp with Content-Type: application/x-www-form-urlencoded and the custom header X-NITRO-USER: xpyZxwy6; a vulnerable host will reflect 'alert(31337)' in the HTML body with a text/html Content-Type and HTTP 200 status.
- →Match response body for reflected XSS payload string 'alert(31337)', response header containing 'text/html', and HTTP status 200 to confirm exploitation.
- →The XSS injection point is the 'appname' POST parameter, exploited via a newline-prefixed payload (%0aalert(31337)), indicating insufficient sanitization of that field in the /menu/stapp endpoint.
- ·Affected versions span multiple product lines; ensure patching covers all relevant branches: Citrix ADC/Gateway before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14, 10.5-70.18 and Citrix SDWAN WAN-OP before 11.1.1a, 11.0.3d, 10.2.7. ↗
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
vulncheck6.1MEDIUM
CVEs like this are exactly what “Exploited This Week” covers.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-h686-q2xf-663f: Improper input validation in Citrix ADC and Citrix Gateway versions before 13
ghsa_unreviewed·2022-05-24
CVE-2020-8191 [MEDIUM] GHSA-h686-q2xf-663f: Improper input validation in Citrix ADC and Citrix Gateway versions before 13
Improper input validation in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows reflected Cross Site Scripting (XSS).
VulnCheck
Citrix application_delivery_controller_firmware Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
vulncheck·2020·CVSS 6.1
CVE-2020-8191 [MEDIUM] Citrix application_delivery_controller_firmware Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Citrix application_delivery_controller_firmware Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper input validation in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows reflected Cross Site Scripting (XSS).
Affected: Citrix application_delivery_controller_firmware
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-04-06&host_type=src&vulnerability=cve-2020-8191; https://dashboard.shadowserver.org/statist
Citrix
Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP appliance Security Update
vendor_citrix·2020-08-17·CVSS 6.5
CVE-2019-18177 [MEDIUM] Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP appliance Security Update
Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP appliance Security Update
of Problem Multiple vulnerabilities have been discovered in Citrix ADC (formerly known as NetScaler ADC), Citrix Gateway (formerly known as NetScaler Gateway) and Citrix SD-WAN WANOP appliance models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities, if exploited, could result in a number of security issues including: Attacks that are limited to the management interface System compromise by an unauthenticated user on the management network. System compromise through Cross Site Scripting (XSS) on the management interface Creation of a download link for the device which, if downloaded and then executed by an unauthenticated user on the management network, may result in the c
Citrix
CVE-2020-8191: Improper input validation in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SD
vendor_citrix·2020-07-10·CVSS 6.1
CVE-2020-8191 [MEDIUM] CWE-79 CVE-2020-8191: Improper input validation in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SD
CVE-2020-8191: Improper input validation in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows reflected Cross Site Scripting (XSS).
No detection rules found.
Nuclei
Citrix ADC/Gateway - Cross-Site Scripting
nuclei·CVSS 6.1
CVE-2020-8191 [MEDIUM] Citrix ADC/Gateway - Cross-Site Scripting
Citrix ADC/Gateway - Cross-Site Scripting
Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 contain a cross-site scripting vulnerability due to improper input validation.
Template:
id: CVE-2020-8191
info:
name: Citrix ADC/Gateway - Cross-Site Scripting
author: dwisiswant0
severity: medium
description: |
Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 contain a cross-site scripting vulnerability due to improper input validation.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts i
Tenable
CVE-2020-8193, CVE-2020-8195, and CVE-2020-8196: Active Exploitation of Citrix Vulnerabilities
blogs_tenable·2020-07-15·CVSS 6.5
[MEDIUM] CVE-2020-8193, CVE-2020-8195, and CVE-2020-8196: Active Exploitation of Citrix Vulnerabilities
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Greynoiseio
NoiseLetter October 2025
blogs_greynoiseio
NoiseLetter October 2025
CVE Disclosure Early Warning Get an early warning when traffic spikes indicate a high likelihood of new disclosures
Compromised Asset Detection Find out immediately if an asset communicates with a malicious IP address
Vulnerability Prioritization Get real-time insight into active exploitation trends to better understand risk and severity
SOC Efficiency Filter out noisy, low priority and false-positive alerts from mass internet scanners
Incident Investigation Add context to incidents to speed the determinations of scope and timelines
Threat Hunting Quickly identify anomalous behavior and enrich your threat hunting campaigns
Why GreyNoise
CVE Disclosure Early Warning Get an early warning when traffic spikes indicate a high likelihood of new disclosures
Compromised Asset Detection Fin
2020-07-10
Published
Exploited in the wild