CVE-2003-1373

Directory traversal vulnerability in auth.php for PhpBB 1.4.0 through 1.4.4 allows remote attackers to read and include arbitrary files via .. (dot dot) sequences followed by NULL (%00) characters in CGI parameters, as demonstrated using the lang parameter in prefs.php.

Published: 2003-12-31 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-1373 is rated Moderate Risk (51.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.27%). EPSS rose +1.11% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2003-1373

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 2026-06-15 0.15% 1.27% +1.11%
2 2025-11-11 0.14% 0.15% +0.01%
3 2025-03-30 — 0.14% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-1373

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2003-1373

Affected software / configurations for CVE-2003-1373

Vendor Product Version Raw CPE
phpbb_group phpbb 1.4.0 cpe:2.3:a:phpbb_group:phpbb:1.4.0:*:*:*:*:*:*:*
phpbb_group phpbb 1.4.1 cpe:2.3:a:phpbb_group:phpbb:1.4.1:*:*:*:*:*:*:*
phpbb_group phpbb 1.4.2 cpe:2.3:a:phpbb_group:phpbb:1.4.2:*:*:*:*:*:*:*
phpbb_group phpbb 1.4.4 cpe:2.3:a:phpbb_group:phpbb:1.4.4:*:*:*:*:*:*:*

References for CVE-2003-1373

cvelogic Threat Intelligence