HOMEVULNERABILITIESCVE-1999-1053
HIGHPOC

CVE-1999-1053

NVD-CWE-OtherPublished: September 13, 1999· Updated: Jun 16, 2026

7.5
CVSS v3.1

Official Description

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 "-->".

NVD Source

Technical Analysis

CVE-1999-1053 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-1999-1053. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityP
IntegrityP
AvailabilityP
AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected Vendors & Products

Apache1 product(s)
http server
matt_wright1 product(s)
matt wright guestbook
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.securityfocus.com/bid/776
PATCHhttp://www.securityfocus.com/bid/776
ADVISORYhttp://www.securityfocus.com/archive/1/33674
ADVISORYhttp://www.securityfocus.com/archive/82/27296
ADVISORYhttp://www.securityfocus.com/archive/82/27560
ADVISORYhttp://www.securityfocus.com/archive/1/33674
ADVISORYhttp://www.securityfocus.com/archive/82/27296
ADVISORYhttp://www.securityfocus.com/archive/82/27560

All References (8)

→
http://www.securityfocus.com/archive/1/33674Vendor Advisory
→
http://www.securityfocus.com/archive/82/27296Exploit · Vendor Advisory
→
http://www.securityfocus.com/archive/82/27560Vendor Advisory
→
http://www.securityfocus.com/bid/776Exploit · Patch · Vendor Advisory
→
http://www.securityfocus.com/archive/1/33674Vendor Advisory
→
http://www.securityfocus.com/archive/82/27296Exploit · Vendor Advisory
→
http://www.securityfocus.com/archive/82/27560Vendor Advisory
→
http://www.securityfocus.com/bid/776Exploit · Patch · Vendor Advisory

Quick Facts

CVE IDCVE-1999-1053
CVSS Score7.5 / 10
SeverityHIGH
WeaknessNVD-CWE-Other
CISA KEVNo
ExploitPOC
Affected2 vendor(s)
PublishedSep 13, 1999

Related CVEs (NVD-CWE-Other)

CVE-2005-1693
10.0
CVE-2005-1560
10.0
CVE-2005-1559
10.0
CVE-2005-1596
10.0
CVE-1999-0754
10.0
CVE-2005-1738
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-1999-1053 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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