CVE-2003-0899

9.8
CRITICALCVSS v3.1 Base Score
22.19%
LOW RiskEPSS (98th percentile)

Buffer overflow in defang in libhttpd.c for thttpd 2.21 to 2.23b1 allows remote attackers to execute arbitrary code via requests that contain '<' or '>' characters, which trigger the overflow when the characters are expanded to "&lt;" and "&gt;" sequences.

Published: 11/3/2003
Modified: 6/16/2026
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Vulnerability Summary

CVSS v3 Score

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2 Score

7.5

AV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS Score (Exploitation Probability)

22.19%LOW Exploitation Risk
98th percentile

This vulnerability has a 22.19% probability of being exploited in the next 30 days, ranking higher than 98% of all scored CVEs.

CWE Classification

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