CVE-2003-1302

Exp

The IMAP functionality in PHP before 4.3.1 allows remote attackers to cause a denial of service via an e-mail message with a (1) To or (2) From header with an address that contains a large number of "\" (backslash) characters.

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-2003-1302 is rated Exploit Available (58.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.58%). 1 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-2003-1302

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

Exploit prediction scoring system (EPSS) score for CVE-2003-1302

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 2025-12-28 0.67% 0.58% -0.09%
2 2025-12-27 0.58% 0.67% +0.09%
3 2025-10-28 — 0.58% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-1302

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-2003-1302

OS Trackers for CVE-2003-1302

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2003-1302

Affected software / configurations for CVE-2003-1302

Vendor Product Version Raw CPE
php php 4.2 cpe:2.3:a:php:php:4.2:*:dev:*:*:*:*:*
php php 4.2.0 cpe:2.3:a:php:php:4.2.0:*:*:*:*:*:*:*
php php 4.2.1 cpe:2.3:a:php:php:4.2.1:*:*:*:*:*:*:*
php php 4.2.2 cpe:2.3:a:php:php:4.2.2:*:*:*:*:*:*:*
php php 4.2.3 cpe:2.3:a:php:php:4.2.3:*:*:*:*:*:*:*
php php 4.3.0 cpe:2.3:a:php:php:4.3.0:*:*:*:*:*:*:*

References for CVE-2003-1302

cvelogic Threat Intelligence