CVE-2002-1888: CommonName Toolbar 3.5.2.0 sends unqualified domain name requests to the CommonName organization and possibly

Routine

LOW 2.1DOWNGRADE

CVE-2002-1888 is a low-severity flaw (CVSS 2.1) affecting commonname toolbar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CommonName Toolbar 3.5.2.0 sends unqualified domain name requests to the CommonName organization and possibly other web servers for name resolution, which allows those organizations to obtain internal server names.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.3% (top 71%)
CISA exploited list	No
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: commonname

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

commonname commonname toolbar DOWNGRADE

Affected: 3.5.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.2.0

1. Check installed version

apt-cache policy commonname-toolbar || rpm -q commonname-toolbar || commonname-toolbar --version

2. No fixed release: DOWNGRADE to a release before 3.5.2.0 (Debian / Ubuntu)

apt-cache madison commonname-toolbar sudo apt install commonname-toolbar=<VERSION_BEFORE_3.5.2.0> sudo apt-mark hold commonname-toolbar

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

dnf --showduplicates list commonname-toolbar sudo dnf downgrade commonname-toolbar-<VERSION_BEFORE_3.5.2.0> sudo dnf versionlock add commonname-toolbar

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-2002-1888?

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

Is CVE-2002-1888 being exploited?

CVE-2002-1888 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-2002-1888 affect?

CVE-2002-1888 affects commonname toolbar. Severity is low (CVSS 2.1). CommonName Toolbar 3.5.2.0 sends unqualified domain name requests to the CommonName organization and possibly other web servers for name resolution, which allows those organizations to obtain internal server names.

How urgent is CVE-2002-1888?

Priority 14/100. No elevated risk signals yet.

References

← Back to latest CVEs