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TI-2003-00821 Aliases CVE-2003-0899GHSA-28q9-rp4x-j7g7

Buffer overflow in defang in libhttpd.c for thttpd 2.21 to 2.23b1 allows remote attackers…

Priority MEDIUM 62CWE-131Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-131 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.22187 97th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:acme:thttpd:*:*:*:*:*:*:*:*2.21 to before 2.23VulnerableACME
cpe:2.3:a:acme:thttpd:2.23:-:*:*:*:*:*:*2.23VulnerableACME
cpe:2.3:a:acme:thttpd:2.23:b1:*:*:*:*:*:*2.23 b1VulnerableACME
  • cpe:2.3:a:acme:thttpd:*:*:*:*:*:*:*:* Versions 2.21 to before 2.23 Vulnerable ·ACME
  • cpe:2.3:a:acme:thttpd:2.23:-:*:*:*:*:*:* Versions 2.23 Vulnerable ·ACME
  • cpe:2.3:a:acme:thttpd:2.23:b1:*:*:*:*:*:* Versions 2.23 b1 Vulnerable ·ACME

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2003-0899
  2. 2026-10-03 Alias added: GHSA-28q9-rp4x-j7g7

References

Exploit 1

Advisory 1

Other 2

  • TI-2009-04252 thttpd 2.25b0 writes data to a log file without sanitizing non-printable characters… CVSS 3.1CRITICAL 9.8
  • TI-2001-01444 Off-by-one buffer overflow in Basic Authentication in Acme Labs thttpd 1.95 through 2.20… CVSS 3.1CRITICAL 9.8
  • TI-2017-12928 The htpasswd implementation of mini_httpd before v1.28 and of thttpd before v2.28 is… CVSS 3.0CRITICAL 9.8
  • TI-2007-00153 thttpd 2007 has buffer underflow. CVSS 3.1CRITICAL 9.8
  • TI-2001-00849 Acme Thttpd Secure Webserver before 2.22, with the chroot option enabled, allows remote… CVSS 2.0MEDIUM 5.0
  • TI-2012-04741 thttpd has a local DoS vulnerability via specially-crafted .htpasswd files CVSS 3.1MEDIUM 5.5
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences