CVE-1999-1053: guestbook.pl cleanses user-inserted SSI commands by removing text between "<!--" and "-->" separators, which allows remo
Summary
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 "-->".
Why It Matters
UNKNOWN severity with CVSS n/a.
Current Status
- Vulnerability status: Not listed in CISA KEV
- Last intelligence update: 2026-08-21 · source: NVD
Entity Activity Timeline
- 2026-08-21 — Intelligence record updated（NVD sync）
Severity
UNKNOWN
Source Attribution
Source: NVD · Updated: 2026-08-21T04:30:49.353Z · Confidence: high
Impact
Based on CVSS vector: n/a — assess confidentiality, integrity, and availability impact via the official vector documentation.
Affected Software
Fix
Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.
Sources & Evidence
- http://www.securityfocus.com/archive/1/33674
- http://www.securityfocus.com/archive/82/27296
- http://www.securityfocus.com/archive/82/27560
- http://www.securityfocus.com/bid/776
- http://www.securityfocus.com/archive/1/33674
- http://www.securityfocus.com/archive/82/27296
- http://www.securityfocus.com/archive/82/27560
- http://www.securityfocus.com/bid/776
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