UpHeron
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Servers and applications

CVE-2002-1783

CRLF injection vulnerability in PHP 4.2.1 through 4.2.3, when allow_url_fopen is enabled, allows remote attackers to modify HTTP headers for outgoing requests by causing CRLF sequences to be injected into arguments that are passed to the (1) fopen or (2) file functions.

Severity
Medium 5.0
Published
31 Dec 2002
Last changed
16 Jun 2026
Added to UpHeron
14 Oct 2026
Exploit chance
17% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Change some data
CVSS vector
AV:N/AC:L/Au:N/C:N/I:P/A:N
Sources
NVD

Affected software

SoftwareAffected versions
PHPServers and applications · cpe:a:php:php
  • Version 4.2.3
  • Version 4.2.2
  • Version 4.2.1
  • Version 4.2.0
All 17 release lines
  • Version 3.0.14
  • Version 3.0.15
  • Version 3.0.16
  • Version 3.0.17
  • Version 3.0.18
  • Version 4.0.3
  • Version 4.0.4
  • Version 4.0.5
  • Version 4.0.6
  • Version 4.0.7
  • Version 4.1.0
  • Version 4.1.1
  • Version 4.1.2
  • Version 4.2.0
  • Version 4.2.1
  • Version 4.2.2
  • Version 4.2.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2002-1783
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2002-1783