How severe is CVE-2018-8913?

CVE-2018-8913 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2018-8913 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-8913?

CVE-2018-8913 affects Synology Web Station. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-8913?

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-2018-8913 published?

CVE-2018-8913 was published on 2019-04-01 and last updated on 2026-06-17.

CVE-2018-8913

CVE-2018-8913 is a high-severity vulnerability in Synology Web Station with a CVSS 3.x base score of 7.1. 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-601.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Synology Web Station
Published: 2019-04-01
Last modified: 2026-06-17

Description

Missing custom error page vulnerability in Synology Web Station before 2.1.3-0139 allows remote attackers to conduct phishing attacks via a crafted URL.

Frequently asked questions

What is CVE-2018-8913?: Missing custom error page vulnerability in Synology Web Station before 2.1.3-0139 allows remote attackers to conduct phishing attacks via a crafted URL.
How severe is CVE-2018-8913?: CVE-2018-8913 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2018-8913 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-8913?: CVE-2018-8913 affects Synology Web Station. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-8913?: 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-2018-8913 published?: CVE-2018-8913 was published on 2019-04-01 and last updated on 2026-06-17.

References

https://www.synology.com/security/advisory/Synology_SA_18_29

Affected products (1)

cpe:2.3:a:synology:web_station:*:*:*:*:*:*:*:*

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