Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-1999-1053

81
FAUCET Score

CVE-1999-1053 describes a critical vulnerability in guestbook.pl, particularly when used with Apache 1.3.9 and potentially other versions, where inadequate sanitization of user-inserted Server-Side Include (SSI) commands allows remote attackers to execute arbitrary commands. The vulnerability arises because guestbook.pl only removes text between "<!--" and "-->", while Apache recognizes other closing sequences, enabling bypass. This vulnerability carries a high CVSS score of 7.5, indicating a network-based attack with low complexity, requiring no authentication, and leading to full compromise of confidentiality, integrity, and availability. Exploit code, including a Metasploit module, is publicly available, though the CVE is not listed in CISA's KEV catalog and shows no active community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.3.9CPE matchmatch criteria
cpe:2.3:a:apache:http_server:1.3.9:*:*:*:*:*:*:*
2.3CPE matchmatch criteria
cpe:2.3:a:matt_wright:matt_wright_guestbook:2.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
85.20%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Metasploit: Matt Wright guestbook.pl Arbitrary Command Execution · Nov 5, 1999
ExploitDB: EDB-16914 · Jul 3, 2010
This CVE's current EPSS score of 0.8520 is in the 100th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

securityfocus.com / archive/1/33674
Vendor Advisory
securityfocus.com / archive/82/27296
ExploitVendor Advisory
securityfocus.com / archive/82/27560
Vendor Advisory
securityfocus.com / bid/776
ExploitPatchVendor Advisory