CVE-2001-0042

Exp

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.

Published: 2001-02-16 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2001-0042 is rated High Exploit Risk (74.1/100): CVSS Medium severity, with high exploitation likelihood (EPSS 41.99%, 97th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +19.45% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2001-0042

EDB-ID Source Kind Published Link
20466 exploit_db edb 2000-12-06 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2001-0042

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-18 22.55% 41.99% +19.45%
2 2025-12-28 24.00% 22.55% -1.46%
3 2025-12-27 — 24.00% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2001-0042

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2001-0042

Affected software / configurations for CVE-2001-0042

Vendor Product Version Raw CPE
apache http_server 1.3 cpe:2.3:a:apache:http_server:1.3:*:*:*:*:*:*:*

References for CVE-2001-0042

cvelogic Threat Intelligence