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Servers and applications

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.

Severity
Medium 5.0
Published
31 Dec 2003
Last changed
16 Jun 2026
Added to UpHeron
14 Oct 2026
Exploit chance
1.4% in the next 30 daysHigher than 71% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
PHPServers and applications · cpe:a:php:php
  • Version 4.2
  • Version 4.2.1
  • Version 4.2.2
  • Version 4.2.3
  • Version 4.3.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2003-1302
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2003-1302