Vulnerability Report

CVE-1999-1357

Title: Netscape Communicator 4.04-4.7 character conversion enables cross-site scripting attacks

XSS

Proof Of Concept

No public PoC currently indexed for CVE-1999-1357.

CWE Category NVD-CWE-noinfo

Published Date Oct 05, 1999

Modified Date Apr 16, 2026

Exploit Status Not Found

Score 7.5 CVSS v2.0

Exploit Probability (EPSS)

1.24%

Vulnerability Summary

CVE-1999-1357: Netscape Communicator 4.04 through 4.7 (and possibly other versions) in various UNIX operating systems converts the 0x8b character to a "<" sign, and the 0x9b character to a ">" sign, which could allow remote attackers to attack other clients via cross-site scripting (CSS) in CGI programs that do not filter these characters.

Impacted Vendors

netscape 1

Reference Links

http://marc.info/?l=bugtraq&m=93915331626185&w=2 http://marc.info/?l=bugtraq&m=93915331626185&w=2

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.5

Access Vector

N/A

Authentication

N/A

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-1999-1357 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

April 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 03, 2025 MODIFIED

Vulnerability data or affected products updated.

October 05, 1999 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.