CVE-1999-1053
7.5
CVSS v2.0 Base Score
90.68%
HIGH RiskEPSS (100th percentile)
NVD-CWE-Other
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: 9/13/1999
Modified: 4/16/2026
Vulnerability Summary
CVSS v2 Score
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS Score (Exploitation Probability)
90.68%HIGH Exploitation Risk
100th percentile
This vulnerability has a 90.68% probability of being exploited in the next 30 days, ranking higher than 100% of all scored CVEs.
CWE Classification
NVD-CWE-Other