CVE-2002-1902: CGIForum 1.0 through 1.05 allows remote attackers to cause a denial of service (infinite recursion) by creatin

Routine

MEDIUM 5.0DOWNGRADE

CVE-2002-1902 is a medium-severity flaw (CVSS 5.0) affecting cgiforum. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CGIForum 1.0 through 1.05 allows remote attackers to cause a denial of service (infinite recursion) by creating a message board post that is a child of an outdated parent.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: markus triska

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

Am I affected?

Timeline

2002-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:00 UTCUpdated Record last modified

markus triska cgiforum DOWNGRADE

Affected: 1.0 · 1.0.1 · 1.0.2 · 1.0.3 · 1.0.4 · 1.0.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison cgiforum sudo apt install cgiforum=<VERSION_BEFORE_1.0> sudo apt-mark hold cgiforum

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

dnf --showduplicates list cgiforum sudo dnf downgrade cgiforum-<VERSION_BEFORE_1.0> sudo dnf versionlock add cgiforum

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.

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-2002-1902?

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

Is CVE-2002-1902 being exploited?

CVE-2002-1902 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-2002-1902 affect?

CVE-2002-1902 affects cgiforum. Severity is medium (CVSS 5.0). CGIForum 1.0 through 1.05 allows remote attackers to cause a denial of service (infinite recursion) by creating a message board post that is a child of an outdated parent.

How urgent is CVE-2002-1902?

Priority 38/100. No elevated risk signals yet.

Related CVEs

CVE-2000-1171 MEDIUM 5.0 DOWNGRADE Directory traversal vulnerability in cgiforum.pl script in CGIForum 1.0 allows remote attackers to ready arbit

References

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