CVE-2021-27182 json
An issue was discovered in MDaemon before 20.0.4.
published 2021-04-14 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13949
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 75%
- public exploits
- 0
- none known
Summary
An issue was discovered in MDaemon before 20.0.4. There is an IFRAME injection vulnerability in Webmail (aka WorldClient). It can be exploited via an email message. It allows an attacker to perform any action with the privileges of the attacked user.
Patch / fix
- altn mdaemon 20.0.4
Exploit prediction
1.55% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/chudyPB/MDaemon-Advisories referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
References
-
github.com
/chudyPB/MDaemon-Advisories
exploit, third-party-advisory
-
altn.com
/Support/SecurityUpdate/MD011221_MDaemon_EN/
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-27182
- NVD CVE-2021-27182
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