How severe is CVE-2018-18013?

CVE-2018-18013 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-18013 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18013?

CVE-2018-18013 affects Citrix Xenmobile Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18013?

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-2018-18013 published?

CVE-2018-18013 was published on 2018-10-24 and last updated on 2026-06-17.

CVE-2018-18013

CVE-2018-18013 is a high-severity vulnerability in Citrix Xenmobile Server with a CVSS 3.x base score of 7.8. 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-502.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Citrix Xenmobile Server
Published: 2018-10-24
Last modified: 2026-06-17

Description

* Xen Mobile through 10.8.0 includes a service listening on port 5001 within its firewall that accepts unauthenticated input. If this service is supplied with raw serialised Java objects, it deserialises them back into Java objects in memory, giving rise to a remote code execution vulnerability. NOTE: the vendor disputes that this is a vulnerability, stating it is "already mitigated by the internal firewall that limits access to configuration services to localhost.

Frequently asked questions

What is CVE-2018-18013?: * Xen Mobile through 10.8.0 includes a service listening on port 5001 within its firewall that accepts unauthenticated input. If this service is supplied with raw serialised Java objects, it deserialises them back into Java objects in memory, giving rise to a remote code execution vulnerability. NOTE: the vendor disputes that this is a vulnerability, stating it is "already mitigated by the internal firewall that limits access to configuration services to localhost.
How severe is CVE-2018-18013?: CVE-2018-18013 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-18013 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18013?: CVE-2018-18013 affects Citrix Xenmobile Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18013?: 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-2018-18013 published?: CVE-2018-18013 was published on 2018-10-24 and last updated on 2026-06-17.

References

https://advisories.dxw.com/advisories/xen-mobile-vulnerable-to-code-execution-via-object-serialisation/

Affected products (1)

cpe:2.3:a:citrix:xenmobile_server:*:*:*:*:*:*:*:*

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