CVE-2020-8191Application Delivery Controller Firmware XSS
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).
Published Jul 10, 2020 · Updated Nov 21, 2024
Key Facts
Patch immediately- CVE-2020-8191 is a medium-severity vulnerability (CVSS 6.1 v3.1) affecting Application Delivery Controller Firmware (Citrix), Gateway Firmware (Citrix), Netscaler Gateway Firmware (Citrix) and 2 more products.
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Apr 6, 2024. No public exploit code is known.
- EPSS estimates a 23% probability of exploitation in the next 30 days.
- Fixed versions are available, including Application Delivery Controller Firmware 10.5-70.18, Gateway Firmware 13.0-58.30, Netscaler Gateway Firmware 10.5-70.18.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
23%
Higher than 97.7% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
41/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Apr 6, 2024
1366 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
10
Reports of active use
Advisories And Exploit References
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).
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Apr 6, 2024 | n/a | Not reported |
| Industry KEV feed | Apr 6, 2024 | n/a | Not reported |
Affected Products
5 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Application Delivery Controller FirmwareCitrix | See advisory | 10.5-70.18 |
| Gateway FirmwareCitrix | See advisory | 13.0-58.30 |
| Netscaler Gateway FirmwareCitrix | See advisory | 10.5-70.18 |
| SD-WAN WanopCitrix | See advisory | 10.2.7 |
| Citrix ADC, Citrix Gateway, Citrix SDWAN WAN-OP | >= Citrix ADC and Citrix Gateway 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 11.1.1a, 11.0.3d and 10.2.7 | n/a |
Patched Releases
Application Delivery Controller Firmware
10.5-70.18
Gateway Firmware
13.0-58.30
Netscaler Gateway Firmware
10.5-70.18
SD-WAN Wanop
10.2.7
Timeline
Publicly disclosed
Jul 10, 2020
Added to CIRCL KEV
Apr 6, 2024
Added to Industry KEV feed
Apr 6, 2024
Last updated
Nov 21, 2024
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- advisorysupport.citrix.com · CTX276688
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
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: Application Delivery Controller Firmware (Citrix); Gateway Firmware (Citrix); Netscaler Gateway Firmware (Citrix), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Apr 6, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Application Delivery Controller Firmware 10.5-70.18, Gateway Firmware 13.0-58.30, Netscaler Gateway Firmware 10.5-70.18.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2020-8191 On Your Attack Surface?
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