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CVE-2001-0991

37
FAUCET Score

CVE-2001-0991 describes a cross-site scripting (XSS) vulnerability in Proxomitron Naoko-4 BetaFour and earlier versions. This flaw allows remote attackers to execute arbitrary script on client machines by crafting a malicious URL that is then reflected in an error message. The vulnerability carries a high CVSS score of 7.5, indicating a network-based attack with low complexity, requiring no authentication, and potentially leading to partial confidentiality, integrity, and availability compromise. While there is no evidence of active exploitation (not in KEV), an exploit is publicly available on ExploitDB, and the CVE has garnered significant community discussion with 10 mentions.

Impacted Technologies

VendorProductVersion(s)CPE
beta1CPE matchmatch criteria
cpe:2.3:a:scott_r._lemmon:proxomitron_naoko-4:beta1:*:*:*:*:*:*:*
beta2CPE matchmatch criteria
cpe:2.3:a:scott_r._lemmon:proxomitron_naoko-4:beta2:*:*:*:*:*:*:*
beta3CPE matchmatch criteria
cpe:2.3:a:scott_r._lemmon:proxomitron_naoko-4:beta3:*:*:*:*:*:*:*
beta4CPE matchmatch criteria
cpe:2.3:a:scott_r._lemmon:proxomitron_naoko-4:beta4:*:*:*:*:*:*:*

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
7.10%
Probability of exploitation in next 30 days
EPSS Percentile
93.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-21025 · Jul 24, 2001
This CVE's current EPSS score of 0.0710 is in the 89th percentile among its peer group of 51,553 CVEs.

Social Chatter

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

exchange.xforce.ibmcloud.com / vulnerabilities/6887
securityfocus.com / archive/1/198954
PatchVendor Advisory
securityfocus.com / bid/3087
ExploitPatchVendor Advisory