CVE-2021-27182
There is an IFRAME injection vulnerability in Webmail (aka WorldClient).
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.55% probability · 75th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-74
- Affected
- altn/mdaemon
- Source
- cve@mitre.org
EPSS 1.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/chudyPB/MDaemon-AdvisoriesExploit, Third Party Advisory
- https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/Release Notes, Vendor Advisory
- https://github.com/chudyPB/MDaemon-AdvisoriesExploit, Third Party Advisory
- https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/Release Notes, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.