CVE-2003-1303

Exp

Buffer overflow in the imap_fetch_overview function in the IMAP functionality (php_imap.c) in PHP before 4.3.3 allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long e-mail address in a (1) To or (2) From header.

Published: 2003-12-31 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-1303 is rated High Exploit Risk (73.4/100): CVSS Medium severity, with high exploitation likelihood (EPSS 11.90%, 96th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +10.55% over the last day, indicating growing attacker interest. 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-2003-1303

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2003-1303

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 1.35% 11.90% +10.55%
2 2025-12-28 1.70% 1.35% -0.35%
3 2025-12-27 — 1.70% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-1303

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-2003-1303

OS Trackers for CVE-2003-1303

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2003-1303

Affected software / configurations for CVE-2003-1303

Vendor Product Version Raw CPE
php php 4.3.0 cpe:2.3:a:php:php:4.3.0:*:*:*:*:*:*:*
php php 4.3.1 cpe:2.3:a:php:php:4.3.1:*:*:*:*:*:*:*
php php 4.3.2 cpe:2.3:a:php:php:4.3.2:*:*:*:*:*:*:*

References for CVE-2003-1303

cvelogic Threat Intelligence