CVE-2003-1263

Exp

ICAL.EXE in iCal 3.7 allows remote attackers to cause a denial of service (crash) via a malformed HTTP request, possibly due to an invalid method name.

Published: 2003-12-31 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-1263 is rated High Exploit Risk (64.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 8.80%, 92th percentile). 4 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2003-1263

EDB-ID Source Kind Published Link
22118 exploit_db edb 2003-01-03 Exploit-DB ↗
22117 exploit_db edb 2003-01-03 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2003-1263

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 2025-03-30 11.36% 8.80% -2.56%
2 2025-03-29 8.80% 11.36% +2.56%
3 2025-03-17 — 8.80% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-1263

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:N/I:N/A:P 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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2003-1263

Affected software / configurations for CVE-2003-1263

Vendor Product Version Raw CPE
brown_bear_software ical 3.7 cpe:2.3:a:brown_bear_software:ical:3.7:*:*:*:*:*:*:*

References for CVE-2003-1263

cvelogic Threat Intelligence