Is CVE-2003-1303 in the CISA KEV catalog?

No. CVE-2003-1303 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-1303?

CVE-2003-1303 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2003-1303?

CVE-2003-1303 has an EPSS score of 11.90% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2003-1303

MEDIUMEPSS 96th pctl

5.0

CVSS v2

NVD

Description

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.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

11.90%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

http://bugs.php.net/bug.php?id=24150
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=175040
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10346

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.