PatchTheCVECVE-2021-27181: An issue was discovered in MDaemon before 20.0.4
CVE-2021-27181 is a high-severity flaw (CVSS 8.8) affecting mdaemon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered in MDaemon before 20.0.4. Remote Administration allows an attacker to perform a fixation of the anti-CSRF token. In order to exploit this issue, the user has to click on a malicious URL provided by the attacker and successfully authenticate into the application. Having the value of the anti-CSRF token, the attacker may trick the user into visiting his malicious page and performing any request with the privileges of attacke
Why this priority
- High severity
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.7% (top 49%) |
| CISA exploited list | No |
| Weakness | CWE-352 |
| Published | 2021-04-14 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-27181?
mdaemon: upgrade to 20.0.4. Exact commands for each OS are on this page.
Is CVE-2021-27181 being exploited?
CVE-2021-27181 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-27181 affect?
CVE-2021-27181 affects mdaemon. Severity is high (CVSS 8.8). An issue was discovered in MDaemon before 20.0.4. Remote Administration allows an attacker to perform a fixation of the anti-CSRF token. In order to exploit this issue, the user has to click on a malicious URL provided by the attacker and s
How urgent is CVE-2021-27181?
Priority 49/100. High severity; Public exploit reference
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- CVE-2022-29975 MEDIUM 5.4 UPGRADE An Authenticated Reflected Cross-site scripting at CC Parameter was discovered in MDaemon before 22.0.0 .
- CVE-2021-27183 HIGH 7.2 UPGRADE An issue was discovered in MDaemon before 20.0.4
- CVE-2021-27182 HIGH 8.8 UPGRADE An issue was discovered in MDaemon before 20.0.4