How severe is CVE-2018-15335?

CVE-2018-15335 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-15335 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-15335?

CVE-2018-15335 affects F5 Big-ip Access Policy Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-15335?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-15335 published?

CVE-2018-15335 was published on 2018-12-28 and last updated on 2026-06-17.

CVE-2018-15335

CVE-2018-15335 is a medium-severity vulnerability in F5 Big-ip Access Policy Manager with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: F5 Big-ip Access Policy Manager
Published: 2018-12-28
Last modified: 2026-06-17

Description

When APM 13.0.0-13.1.x is deployed as an OAuth Resource Server, APM becomes a client application to an external OAuth authorization server. In certain cases when communication between the BIG-IP APM and the OAuth authorization server is lost, APM may not display the intended message in the failure response

Frequently asked questions

What is CVE-2018-15335?: When APM 13.0.0-13.1.x is deployed as an OAuth Resource Server, APM becomes a client application to an external OAuth authorization server. In certain cases when communication between the BIG-IP APM and the OAuth authorization server is lost, APM may not display the intended message in the failure response
How severe is CVE-2018-15335?: CVE-2018-15335 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-15335 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-15335?: CVE-2018-15335 affects F5 Big-ip Access Policy Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-15335?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-15335 published?: CVE-2018-15335 was published on 2018-12-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*

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