CVE-2020-23776 json
A SSRF vulnerability exists in Winmail 6.5 in app.php in the key parameter when HTTPS is on.
published 2021-01-26 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-16516
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/zhonghaozhao/winmail/issues/3 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/zhonghaozhao/winmail/issues/3
exploit, issue-tracking, third-party-advisory
Sources
- CVE List CVE-2020-23776
- NVD CVE-2020-23776
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