CVE-2001-0452: BRS WebWeaver FTP server before 0.64 Beta allows remote attackers to obtain the real pathname of the server vi

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MEDIUM 5.0DOWNGRADE

CVE-2001-0452 is a medium-severity flaw (CVSS 5.0) affecting webweaver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

BRS WebWeaver FTP server before 0.64 Beta allows remote attackers to obtain the real pathname of the server via a "CD *" command followed by an ls command.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.3% (top 11%)
CISA exploited list	No
Published	2001-06-27
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: brs

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2001-06-27 04:00 UTCPublished CVE record published
2026-06-16 21:54 UTCUpdated Record last modified

brs webweaver DOWNGRADE

Affected: 0.49_beta · 0.50_beta · 0.51_beta · 0.52_beta · 0.60_beta · 0.61_beta · 0.62_beta

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.49_beta

1. Check installed version

apt-cache policy webweaver || rpm -q webweaver || webweaver --version

2. No fixed release: DOWNGRADE to a release before 0.49_beta (Debian / Ubuntu)

apt-cache madison webweaver sudo apt install webweaver=<VERSION_BEFORE_0.49_beta> sudo apt-mark hold webweaver

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list webweaver sudo dnf downgrade webweaver-<VERSION_BEFORE_0.49_beta> sudo dnf versionlock add webweaver

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: BRS Webweaver 0.x - FTP Root Full Path Disclosure

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2001-0452?

webweaver: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2001-0452 being exploited?

CVE-2001-0452 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2001-0452 affect?

CVE-2001-0452 affects webweaver. Severity is medium (CVSS 5.0). BRS WebWeaver FTP server before 0.64 Beta allows remote attackers to obtain the real pathname of the server via a "CD *" command followed by an ls command.

How urgent is CVE-2001-0452?

Priority 45/100. Public exploit reference

Related CVEs

CVE-2003-1165 MEDIUM 5.0 DOWNGRADE Buffer overflow in BRS WebWeaver 1.06 and earlier allows remote attackers to cause a denial of service (crash)
CVE-2003-0409 HIGH 10.0 DOWNGRADE Buffer overflow in BRS WebWeaver 1.04 and earlier allows remote attackers to cause a denial of service (crash)
CVE-2002-1546 HIGH 7.5 DOWNGRADE BRS WebWeaver Web Server 1.01 allows remote attackers to bypass password protections for files and directories
CVE-2001-0453 MEDIUM 5.0 DOWNGRADE Directory traversal vulnerability in BRS WebWeaver HTTP server allows remote attackers to read arbitrary files

References

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