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CVE-2020-8209

62
FAUCET Score

CVE-2020-8209 is an improper access control vulnerability in multiple versions of Citrix XenMobile Server that allows an unauthenticated attacker to read arbitrary files on the server. This vulnerability has a CVSS score of 7.5 (HIGH) due to its network-based attack vector, low attack complexity, and high impact on confidentiality. While not currently in CISA's KEV catalog, its high EPSS score and FAUCET Risk Score of 99/100 indicate a significant likelihood of exploitation. Publicly available Nuclei templates exist for detecting this flaw, and it has garnered considerable community discussion and media coverage, including warnings from Citrix about potential exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 10.8.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenmobile_server:*:*:*:*:*:*:*:*
10.9.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenmobile_server:10.9.0:-:*:*:*:*:*:*
10.9.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenmobile_server:10.9.0:rolling_patch1:*:*:*:*:*:*
10.9.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenmobile_server:10.9.0:rolling_patch2:*:*:*:*:*:*
10.9.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenmobile_server:10.9.0:rolling_patch3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
48.66%
Probability of exploitation in next 30 days
EPSS Percentile
98.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
Nuclei: CVE-2020-8209 · Nov 16, 2020
This CVE's current EPSS score of 0.4866 is in the 98th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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/CTX277457
Vendor Advisory