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Vulnerability record · CVE-2018-13283 · published 1 April 2019

CVE-2018-13283: Synology ssl vpn client vulnerability

Synology · Ssl Vpn Client

Lack of administrator control over security vulnerability in client.cgi in Synology SSL VPN Client before 1.2.5-0226 allows remote attackers to conduct man-in-the-middle attacks via the (1) command, (2) hostname, or (3) port parameter.

7.4 CVSS 3.0 High EPSS 1.4% · top 28.9% CWE-671 · CWE-671
7.4CVSS 3.0 base score, v2 5.8
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Lack of administrator control over security vulnerability in client.cgi in Synology SSL VPN Client before 1.2.5-0226 allows remote attackers to conduct man-in-the-middle attacks via the (1) command, (2) hostname, or (3) port parameter.

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.synology.com/security/advisory/Synology_SA_18_30 Vendor Advisory
https://www.synology.com/security/advisory/Synology_SA_18_30 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.1CVE-2021-47961Synology ssl vpn client vulnerabilityA plaintext storage of a password vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access or influence the user'…EPSS 0.32%8.1CVE-2018-8929Synology ssl vpn client cleartext transmission vulnerabilityImproper restriction of communication channel to intended endpoints vulnerability in HTTP daemon in Synology SSL VPN Client before 1.2.4-0224 allows …EPSS 0.75%6.5CVE-2021-47960Synology ssl vpn client vulnerabilityA files or directories accessible to external parties vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access fi…EPSS 0.19%5.5CVE-2023-5748Synology ssl vpn client classic buffer overflow vulnerabilityBuffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in cgi component in Synology SSL VPN Client before 1.4.7-0687 al…EPSS 0.19%

Source: NIST National Vulnerability Database (record CVE-2018-13283), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.