CVE-2006-2247

WebCalendar 1.0.1 to 1.0.3 generates different error messages depending on whether or not a username is valid, which allows remote attackers to enumerate valid usernames.

Published: 2006-05-09 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-2247 is rated Moderate Risk (43.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.56%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2006-2247

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 2025-06-02 0.54% 0.56% +0.02%
2 2025-03-30 0.58% 0.54% -0.04%
3 2025-03-29 — 0.58% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-2247

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2006-2247

OS Trackers for CVE-2006-2247

vendor priority summary link
ubuntu medium CVE-2006-2247 medium priority: Ubuntu including 1 source packages (webcalendar), 9 status rows across 9 suites (dapper, edgy, feisty, gutsy, hardy, intrepid, jaunty, karmic, upstream): released 6, DNE 1, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2006-2247

Affected software / configurations for CVE-2006-2247

Vendor Product Version Raw CPE
webcalendar webcalendar 1.0.1 cpe:2.3:a:webcalendar:webcalendar:1.0.1:*:*:*:*:*:*:*
webcalendar webcalendar 1.0.2 cpe:2.3:a:webcalendar:webcalendar:1.0.2:*:*:*:*:*:*:*
webcalendar webcalendar 1.0.3 cpe:2.3:a:webcalendar:webcalendar:1.0.3:*:*:*:*:*:*:*

References for CVE-2006-2247

cvelogic Threat Intelligence