SSRF in Weaver E-Bridge
CVE-2020-37278
Weaver e-Bridge contains an unauthenticated arbitrary file read vulnerability that allows remote attackers to access arbitrary files on the host system by supplying a file: URL to the downloadUrl parameter of the saveYZJFile endpoint. Attackers can exploit this flaw to read sensitive files such as /etc/passwd or configuration and credential files, and the same endpoint's support for http(s) URLs also enables server-side request forgery against internal network resources. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-17.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/wea… (technical-description)
- www.weaver.com.cn/cs/ebridge_full_log_en.html (release-notes)
- www.vulncheck.com/advisories/weaver-e-bridge-unauthenticated-arbitrary-file-rea… (third-party-advisory)
Frequently asked questions
- What is CVE-2020-37278?
- CVE-2020-37278 is a high-severity vulnerability in Weaver E-Bridge, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.5/10. Published 2026-10-02.
- How severe is CVE-2020-37278?
- High severity. CVSS v3 base score is 7.5 out of 10.