CVE-1999-1357: n/a vulnerability

CVE-1999-1357: Netscape Communicator 4.04 through 4.7 (and possibly other versions) in various UNIX operating systems conv...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 1, 2024, 17:11 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old browser-side issue affecting Netscape Communicator on UNIX. Certain byte values could be interpreted as angle brackets, allowing unsafe CGI output to become cross-site scripting content for other users. Business urgency is mainly for legacy environments, archives, or labs still using affected software. Modern enterprise exposure should be limited unless legacy UNIX desktops, old browser test environments, or unmaintained CGI applications remain in use. The source bundle does not identify modern affected products or supported versions. Low for most modern organizations, but verify legacy estates. Treat as an exposure-discovery item rather than an emergency unless affected Netscape clients and CGI applications are still operational. Mitigation focus: Retire or replace any remaining Netscape Communicator installations.; Review CGI applications for robust output encoding and input normalization.; Do not rely only on literal angle-bracket filtering..

Prepared: Jul 1, 2026, 09:01 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 12, 2001, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

1Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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