CVE-2002-0300: gnujsp 1.0.0 and 1.0.1 allows remote attackers to list directories, read source code of certain scripts, and b

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MEDIUM 5.0DOWNGRADE

CVE-2002-0300 is a medium-severity flaw (CVSS 5.0) affecting gnujsp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

gnujsp 1.0.0 and 1.0.1 allows remote attackers to list directories, read source code of certain scripts, and bypass access restrictions by directly requesting the target file from the gnujsp servlet, which does not work around a limitation of JServ and does not process the requested file.

Why this priority

EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	7.3% (top 6%)
CISA exploited list	No
Published	2002-05-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: gnujsp

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

Am I affected?

Timeline

2002-05-31 04:00 UTCPublished CVE record published
2026-06-16 21:57 UTCUpdated Record last modified

gnujsp gnujsp DOWNGRADE

Affected: 1.0.0 · 1.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison gnujsp sudo apt install gnujsp=<VERSION_BEFORE_1.0.0> sudo apt-mark hold gnujsp

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

dnf --showduplicates list gnujsp sudo dnf downgrade gnujsp-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add gnujsp

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: GNUJSP 1.0 - File 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-2002-0300?

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

Is CVE-2002-0300 being exploited?

CVE-2002-0300 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-2002-0300 affect?

CVE-2002-0300 affects gnujsp. Severity is medium (CVSS 5.0). gnujsp 1.0.0 and 1.0.1 allows remote attackers to list directories, read source code of certain scripts, and bypass access restrictions by directly requesting the target file from the gnujsp servlet, which does not work around a limitation

How urgent is CVE-2002-0300?

Priority 46/100. EPSS top 6%: very likely to be exploited; Public exploit reference

References

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