Is CVE-2020-37278 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2020-37278 being exploited in the wild.

How severe is CVE-2020-37278?

High severity, with a CVSS score of 7.5, published 2 October 2026.

Is there a fix for CVE-2020-37278?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2020-37278 attacked?

It is attacked over the network.

Am I affected by CVE-2020-37278?

Check whether you run Weaver e-Bridge. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2020-37278: Weaver e-Bridge arbitrary file read in saveYZJFile

CVE-2020-37278 · Severity: high · CVSS 7.5 · Published 2026-10-02

Weaver e-Bridge is a collaboration and communications platform used in enterprise environments. An unauthenticated attacker can read arbitrary files from the server, including sensitive system files and credentials, by crafting a malicious request to the saveYZJFile endpoint. The same vulnerability also enables server-side request forgery attacks against internal network resources, potentially exposing data or facilitating lateral movement within the organization.

Vendors: Weaver.

Quick answers

Is CVE-2020-37278 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2020-37278 being exploited in the wild.
How severe is CVE-2020-37278?: High severity, with a CVSS score of 7.5, published 2 October 2026.
Which products and versions are affected?: Weaver e-Bridge.
Is there a fix for CVE-2020-37278?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2020-37278 attacked?: It is attacked over the network.
Am I affected by CVE-2020-37278?: Check whether you run Weaver e-Bridge. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a path traversal / local file inclusion (CWE-22) in the saveYZJFile endpoint that allows unauthenticated remote attackers to supply a file: URL via the downloadUrl parameter to read arbitrary files. The endpoint also supports http(s) URLs, enabling server-side request forgery (CWE-918) against internal resources. No authentication or user interaction is required for exploitation; attackers need only network access to the e-Bridge instance.

Affected products

Weaver e-Bridge

Timeline

2023-10-17: disclosed: Exploitation evidence first observed by Shadowserver Foundation
2026-10-02: advisory

References

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