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CVE-1999-0031

19
FAUCET Score

CVE-1999-0031, also known as the Bell Labs vulnerability, allowed remote attackers to monitor a user's web activities due to a flaw in JavaScript implementations within Internet Explorer versions 3.x and 4.x, and Netscape Navigator versions 2.x, 3.x, and 4.x. This vulnerability has a low CVSS score of 2.6, indicating a network-based attack with high access complexity and a potential impact limited to confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this decades-old vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
3.0CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:3.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:4.0:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:netscape:communicator:2.0:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:netscape:communicator:3.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:netscape:communicator:4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.6LOW

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
18.30%
Probability of exploitation in next 30 days
EPSS Percentile
96.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1830 is in the 98th percentile among its peer group of 1,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

codetalker.com / advisories/vendor/hp/hpsbux9707-065.html
URL Repurposed