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Servers and applications

CVE-2001-0042

PHP 3.x (PHP3) on Apache 1.3.6 allows remote attackers to read arbitrary files via a modified .. (dot dot) attack containing "%5c" (encoded backslash) sequences.

Severity
Medium 5.0
Published
16 Feb 2001
Last changed
16 Jun 2026
Added to UpHeron
17 Oct 2026
Exploit chance
9.6% in the next 30 daysHigher than 95% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Read some data
CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:N
Sources
NVD

Affected software

SoftwareAffected versions
Apache HTTP ServerServers and applications · cpe:a:apache:http_server
  • Version 1.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2001-0042
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2001-0042