How severe is CVE-2003-1302?

CVE-2003-1302 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2003-1302 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2003-1302?

CVE-2003-1302 primarily affects Php. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2003-1302?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2003-1302 published?

CVE-2003-1302 was published on 2003-12-31 and last updated on 2026-06-16.

CVE-2003-1302

CVE-2003-1302 is a medium-severity vulnerability in Php with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Php
Published: 2003-12-31
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2003-1302?: 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.
How severe is CVE-2003-1302?: CVE-2003-1302 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2003-1302 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-1302?: CVE-2003-1302 primarily affects Php. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-1302?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2003-1302 published?: CVE-2003-1302 was published on 2003-12-31 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:a:php:php:4.2:*:dev:*:*:*:*:*
cpe:2.3:a:php:php:4.2.0:*:*:*:*:*:*:*
cpe:2.3:a:php:php:4.2.1:*:*:*:*:*:*:*
cpe:2.3:a:php:php:4.2.2:*:*:*:*:*:*:*
cpe:2.3:a:php:php:4.2.3:*:*:*:*:*:*:*
cpe:2.3:a:php:php:4.3.0:*:*:*:*:*:*:*

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