How severe is CVE-2018-20402?

CVE-2018-20402 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-20402 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20402?

CVE-2018-20402 affects Safe Fme Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20402?

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-2018-20402 published?

CVE-2018-20402 was published on 2018-12-23 and last updated on 2026-06-17.

CVE-2018-20402

CVE-2018-20402 is a high-severity vulnerability in Safe Fme Server with a CVSS 3.x base score of 8.8. 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-1188.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1188
Affected product: Safe Fme Server
Published: 2018-12-23
Last modified: 2026-06-17

Description

Safe Software FME Server through 2018.1 creates and enables three additional accounts in addition to the initial administrator account. The passwords to the three accounts are the same as the usernames, which are guest, user, and author. Logging in with these accounts will grant any user the default privilege roles that were also created for each of the accounts.

Frequently asked questions

What is CVE-2018-20402?: Safe Software FME Server through 2018.1 creates and enables three additional accounts in addition to the initial administrator account. The passwords to the three accounts are the same as the usernames, which are guest, user, and author. Logging in with these accounts will grant any user the default privilege roles that were also created for each of the accounts.
How severe is CVE-2018-20402?: CVE-2018-20402 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-20402 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20402?: CVE-2018-20402 affects Safe Fme Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20402?: 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-2018-20402 published?: CVE-2018-20402 was published on 2018-12-23 and last updated on 2026-06-17.

References

http://docs.safe.com/fme/html/FME_Server_Documentation/Content/AdminGuide/Default_User_Accounts_and_Passwords.htm

Affected products (1)

cpe:2.3:a:safe:fme_server:*:*:*:*:*:*:*:*

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