CVE-2001-0897: Cross-site scripting vulnerability in Infopop Ultimate Bulletin Board (UBB) before 5.47e allows remote attacke

Routine

MEDIUM 5.0DOWNGRADE

CVE-2001-0897 is a medium-severity flaw (CVSS 5.0) affecting ultimate bulletin board. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting vulnerability in Infopop Ultimate Bulletin Board (UBB) before 5.47e allows remote attackers to steal user cookies via an [IMG] tag that references an about: URL with an onerror field.

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	1.9% (top 20%)
CISA exploited list	No
Published	2001-11-15
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: infopop

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

Am I affected?

Timeline

2001-11-15 05:00 UTCPublished CVE record published
2026-06-16 21:55 UTCUpdated Record last modified

infopop ultimate bulletin board DOWNGRADE

Affected: all versions · 1.0 · 2.0 · 2.01 · 2.02 · 2.03 · 2.04 · 2.05

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy ultimate-bulletin-board || rpm -q ultimate-bulletin-board || ultimate-bulletin-board --version

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

apt-cache madison ultimate-bulletin-board sudo apt install ultimate-bulletin-board=<VERSION_BEFORE_1.0> sudo apt-mark hold ultimate-bulletin-board

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

dnf --showduplicates list ultimate-bulletin-board sudo dnf downgrade ultimate-bulletin-board-<VERSION_BEFORE_1.0> sudo dnf versionlock add ultimate-bulletin-board

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-2001-0897?

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

Is CVE-2001-0897 being exploited?

CVE-2001-0897 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-2001-0897 affect?

CVE-2001-0897 affects ultimate bulletin board. Severity is medium (CVSS 5.0). Cross-site scripting vulnerability in Infopop Ultimate Bulletin Board (UBB) before 5.47e allows remote attackers to steal user cookies via an [IMG] tag that references an about: URL with an onerror field.

How urgent is CVE-2001-0897?

Priority 38/100. No elevated risk signals yet.

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References

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