CVE-2020-23776

7.5 highEPSS 0.8%

High (7.5) in winmail project winmail. EPSS 0.8% chance of exploitation in the next 30 days.

A SSRF vulnerability exists in Winmail 6.5 in app.php in the key parameter when HTTPS is on. An attacker can use this vulnerability to cause the server to send a request to a specific URL. An attacker can modify the request header 'HOST' value to cause the server to send the request.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-31)
CWE: CWE-918
Published: 2021-01-26
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

winmail_project:winmail

References

https://github.com/zhonghaozhao/winmail/issues/3
https://github.com/zhonghaozhao/winmail/issues/3

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