⚠ Exploited in the wild
Exploitation observed in the wild. Not yet on CISA KEV.

CVE-2020-8191 — Cross-site Scripting in Citrix Application Delivery Controller Firmware

CWE-79 — Cross-site Scripting8 documents7 sources
Severity
6.1MEDIUMNVD
EPSS
91.0%
top 0.36%
CISA KEV
Not in KEV
Exploit
Exploited in wild
Active exploitation observed
Affected products
12
Citrix Application Delivery Controller FirmwareCitrix Gateway FirmwareCitrix Netscaler Gateway Firmware+9 more
Timeline
PublishedJul 10
Latest updateMay 24

Description

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).

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.7

Affected Packages12 packages

▶NVDcitrix/gateway_firmware13.0 — 13.0-58.30
▶NVDcitrix/netscaler_gateway_firmware10.5 — 10.5-70.18+3
▶NVDcitrix/sd-wan_wanop10.2 — 10.2.7+2

🔴Vulnerability Details

2
GHSA
GHSA-h686-q2xf-663f: Improper input validation in Citrix ADC and Citrix Gateway versions before 13↗2022-05-24
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VulnCheck
Citrix application_delivery_controller_firmware Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')↗2020
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💥Exploits & PoCs

1
Nuclei
Citrix ADC/Gateway - Cross-Site Scripting
▶

📋Vendor Advisories

2
Citrix
Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP appliance Security Update↗2020-08-17
▶
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↗2020-07-10
▶

🕵️Threat Intelligence

2
Tenable
CVE-2020-8193, CVE-2020-8195, and CVE-2020-8196: Active Exploitation of Citrix Vulnerabilities↗2020-07-15
▶
Greynoiseio
NoiseLetter October 2025↗
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