CRLF injection vulnerability in Utils.py in Mailman before 2.1.9rc1 allows remote attackers to spoof messages in the error log and possibly trick the administrator into visiting malicious URLs via CRLF sequences in the URI.
Conclusion & alert: CVE-2006-4624 is rated Low Risk (39.9/100): CVSS Low severity, with medium exploitation likelihood (EPSS 2.75%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 2.70% | 2.75% | +0.05% |
| 2 | 2025-10-01 | 2.39% | 2.70% | +0.31% |
| 3 | 2025-06-16 | — | 2.39% | — |
Full EPSS history (19 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 2.6 | 2.0 | LOW |
|
4.9 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2006-4624 |
ubuntu
|
medium | CVE-2006-4624 medium priority: Ubuntu including 1 source packages (mailman), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2006-4624 |
Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=205651 The Red Hat Security Response Team has rated this issue as having low security impact and expects to release a future update to address this flaw. More information regarding issue severity can be found here: http://www.redhat.com/security/updates/classification/ The risks associated with fixing this bug are greater than the low severity security risk. We therefore currently have no plans to fix this flaw in Red Hat Enterprise Linux 2.1 and 3 which are in maintenance mode. This bug will be addressed in a future update of Red Hat Enterprise Linux 4.