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 an…

published 2020-07-10 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29069

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 23.5%; EPSS 23.5% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known, plus a Nuclei check

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).

Patch / fix

fixed in 4

citrix application_delivery_controller_firmware 10.5-70.18, 11.1-64.14, 12.0-63.21, 12.1-57.18, 13.0-58.30
citrix netscaler_gateway_firmware 10.5-70.18, 11.1-64.14, 12.0-63.21, 12.1-57.18
citrix gateway_firmware 13.0-58.30
citrix sd-wan_wanop 10.2.7, 11.0.3d, 11.1.1a

Exploit prediction

23.46% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Nuclei template Citrix ADC/Gateway - Cross-Site Scripting nuclei detection template

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

n/a Citrix ADC, Citrix Gateway, Citrix SDWAN WAN-OP

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

Citrix rss critical rss

References

support.citrix.com /article/CTX276688
vendor-advisory

Sources

CVE List CVE-2020-8191
NVD CVE-2020-8191

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary