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CVE-2020-8191

37
FAUCET Score

CVE-2020-8191 describes an improper input validation vulnerability in Citrix ADC and Citrix Gateway, as well as Citrix SDWAN WAN-OP, leading to reflected Cross-Site Scripting (XSS). This medium-severity flaw (CVSS 6.1) can be exploited remotely with low attack complexity, requiring user interaction, and could result in limited confidentiality and integrity impacts. While not listed in CISA's KEV catalog, its high EPSS and FAUCET scores, along with available Nuclei templates and community discussion, indicate a significant likelihood of exploitation. Media coverage also highlights its importance.

Impacted Technologies

VendorProductVersion(s)CPE
>= 10.5, < 10.5-70.18CPE matchmatch criteria
cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
>= 11.1, < 11.1-64.14CPE matchmatch criteria
cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
>= 12.0, < 12.0-63.21CPE matchmatch criteria
cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
>= 12.1, < 12.1-57.18CPE matchmatch criteria
cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
>= 13.0, < 13.0-58.30CPE matchmatch criteria
cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
26.14%
Probability of exploitation in next 30 days
EPSS Percentile
97.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Nuclei: CVE-2020-8191 · Jul 12, 2020
This CVE's current EPSS score of 0.2614 is in the 99th percentile among its peer group of 26,208 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

citrixvendor investigatingvia nvd_reference
View patch

References

support.citrix.com / article/CTX276688
Vendor Advisory