CVE-2020-8253

CVE-2020-8253 is a high-severity vulnerability in Citrix Xenmobile Server with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• CVSS v2: 5.0
• EPSS exploit prediction: 2% (74th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-287
• Affected product: Citrix Xenmobile Server
• Published: 2020-09-18
• Last modified: 2026-06-17

Description

Improper authentication in Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP6 and Citrix XenMobile Server before 10.9 RP5 leads to the ability to access sensitive files.

Frequently asked questions

What is CVE-2020-8253?

Improper authentication in Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP6 and Citrix XenMobile Server before 10.9 RP5 leads to the ability to access sensitive files.

How severe is CVE-2020-8253?

CVE-2020-8253 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-8253 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8253?

CVE-2020-8253 primarily affects Citrix Xenmobile Server. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-8253?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-8253 published?

CVE-2020-8253 was published on 2020-09-18 and last updated on 2026-06-17.

References

• https://support.citrix.com/article/CTX277457

Affected products (18)

• cpe:2.3:a:citrix:xenmobile_server:*:*:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.9.0:-:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.9.0:rolling_patch1:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.9.0:rolling_patch2:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.9.0:rolling_patch3:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.9.0:rolling_patch4:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.10.0:-:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.10.0:rolling_patch1:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.10.0:rolling_patch2:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.10.0:rolling_patch3:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.10.0:rolling_patch4:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.10.0:rolling_patch5:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.11.0:-:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.11.0:rolling_patch1:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.11.0:rolling_patch2:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.11.0:rolling_patch3:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.12.0:-:*:*:*:*:*:*
• cpe:2.3:a:citrix:xenmobile_server:10.12.0:rolling_patch1:*:*:*:*:*:*

More vulnerabilities in Citrix Xenmobile Server

• CVE-2020-8212 — Critical (CVSS 9.8): Improper access control in Citrix XenMobile Server 10.12 before RP3, Citrix XenMobile Server 10.11 before RP6, Citrix…
• CVE-2020-8211 — Critical (CVSS 9.8): Improper input validation in Citrix XenMobile Server 10.12 before RP3, Citrix XenMobile Server 10.11 before RP6, Citrix…
• CVE-2018-10653 — Critical (CVSS 9.8): There is an XML External Entity (XXE) Processing Vulnerability in Citrix XenMobile Server 10.8 before RP2 and 10.7…
• CVE-2018-10648 — Critical (CVSS 9.8): There are Unauthenticated File Upload Vulnerabilities in Citrix XenMobile Server 10.8 before RP2 and 10.7 before RP3.
• CVE-2018-18571 — Critical (CVSS 9.1): An Incorrect Access Control vulnerability has been identified in Citrix XenMobile Server 10.8.0 before Rolling Patch 6…
• CVE-2021-44519 — High (CVSS 8.8): In Citrix XenMobile Server through 10.12 RP9, there is an Authenticated Directory Traversal vulnerability, leading to…

All CVEs affecting Citrix Xenmobile Server →

Other CWE-287 (Improper Authentication) vulnerabilities

• CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
• CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
• CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
• CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
• CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
• CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →