How severe is CVE-2017-15890?

CVE-2017-15890 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2017-15890 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-15890?

CVE-2017-15890 affects Synology Mailplus Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-15890?

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

When was CVE-2017-15890 published?

CVE-2017-15890 was published on 2017-12-15 and last updated on 2026-06-17.

CVE-2017-15890

CVE-2017-15890 is a medium-severity vulnerability in Synology Mailplus Server with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Synology Mailplus Server
Published: 2017-12-15
Last modified: 2026-06-17

Description

Cross-site scripting (XSS) vulnerability in Disclaimer in Synology MailPlus Server before 1.4.0-0415 allows remote authenticated users to inject arbitrary web script or HTML via the NAME parameter.

Frequently asked questions

What is CVE-2017-15890?: Cross-site scripting (XSS) vulnerability in Disclaimer in Synology MailPlus Server before 1.4.0-0415 allows remote authenticated users to inject arbitrary web script or HTML via the NAME parameter.
How severe is CVE-2017-15890?: CVE-2017-15890 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2017-15890 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-15890?: CVE-2017-15890 affects Synology Mailplus Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-15890?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-15890 published?: CVE-2017-15890 was published on 2017-12-15 and last updated on 2026-06-17.

References

https://www.synology.com/en-global/support/security/Synology_SA_17_75

Affected products (1)

cpe:2.3:a:synology:mailplus_server:*:*:*:*:*:*:*:*

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