CVE-1999-1053

Exp

guestbook.pl cleanses user-inserted SSI commands by removing text between "<!--" and "-->" separators, which allows remote attackers to execute arbitrary commands when guestbook.pl is run on Apache 1.3.9 and possibly other versions, since Apache allows other closing sequences besides "-->".

Published: 1999-09-13 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-1999-1053 is rated High Exploit Risk (82/100): CVSS High severity, with high exploitation likelihood (EPSS 90.68%, 100th percentile). 4 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.12% 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-1999-1053

EDB-ID Source Kind Published Link
16914 exploit_db edb 2010-07-03 Exploit-DB ↗
9907 exploit_db edb 1999-11-05 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-1999-1053

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 2026-01-20 88.55% 90.68% +2.12%
2 2025-12-28 86.23% 88.55% +2.32%
3 2025-12-27 — 86.23% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-1999-1053

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/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:L)
Exploitation conditions are straightforward and predictable.
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.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-1999-1053

Affected software / configurations for CVE-1999-1053

Vendor Product Version Raw CPE
apache http_server 1.3.9 cpe:2.3:a:apache:http_server:1.3.9:*:*:*:*:*:*:*
matt_wright matt_wright_guestbook 2.3 cpe:2.3:a:matt_wright:matt_wright_guestbook:2.3:*:*:*:*:*:*:*

References for CVE-1999-1053

cvelogic Threat Intelligence