CVE-2001-0557: T

Q: How do I fix CVE-2001-0557?

jana web server: upgrade to newer than 1.46. Exact commands for each OS are on this page.

Q: Is CVE-2001-0557 being exploited?

CVE-2001-0557 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2001-0557 affect?

CVE-2001-0557 affects jana web server. Severity is medium (CVSS 5.0). T. Hauck Jana Webserver 1.46 and earlier allows a remote attacker to view arbitrary files via a '..' (dot dot) attack which is URL encoded (%2e%2e).

Q: How urgent is CVE-2001-0557?

Priority 46/100. EPSS top 4%: very likely to be exploited; Public exploit reference

This week

MEDIUM 5.0UPGRADE

CVE-2001-0557 is a medium-severity flaw (CVSS 5.0) affecting jana web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

T. Hauck Jana Webserver 1.46 and earlier allows a remote attacker to view arbitrary files via a '..' (dot dot) attack which is URL encoded (%2e%2e).

Why this priority

EPSS top 4%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	10.5% (top 4%)
CISA exploited list	No
Published	2001-08-14
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: t. hauck

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

Am I affected?

Timeline

2001-08-14 04:00 UTCPublished CVE record published
2026-06-16 21:54 UTCUpdated Record last modified

t. hauck jana web server UPGRADE

Affected: <= 1.46 · 1.0j · 1.45 · 2.0_beta_1

Fixed in: newer than 1.46

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy jana-web-server || rpm -q jana-web-server || jana-web-server --version

2. UPGRADE to newer than 1.46 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade jana-web-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jana-web-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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: T. Hauck Jana Server 1.45/1.46 - Hex Encoded Directory Traversal

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-2001-0557?

jana web server: upgrade to newer than 1.46. Exact commands for each OS are on this page.

Is CVE-2001-0557 being exploited?

CVE-2001-0557 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-2001-0557 affect?

CVE-2001-0557 affects jana web server. Severity is medium (CVSS 5.0). T. Hauck Jana Webserver 1.46 and earlier allows a remote attacker to view arbitrary files via a '..' (dot dot) attack which is URL encoded (%2e%2e).

How urgent is CVE-2001-0557?

Priority 46/100. EPSS top 4%: very likely to be exploited; Public exploit reference

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References

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