CVE-2002-0457: Cross-site scripting vulnerability in signgbook.php for BG GuestBook 1.0 allows remote attackers to execute ar

This month

HIGH 7.6DOWNGRADE

CVE-2002-0457 is a high-severity flaw (CVSS 7.6) affecting bg guestbook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting vulnerability in signgbook.php for BG GuestBook 1.0 allows remote attackers to execute arbitrary Javascript via encoded tags such as <, >, and & in fields such as (1) name, (2) email, (3) AIM screen name, (4) website, (5) location, or (6) message.

Why this priority

High severity

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

Risk facts

CVSS score	7.6 (High)
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Published	2002-08-12
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: bg guestbook

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

Am I affected?

Timeline

2002-08-12 04:00 UTCPublished CVE record published
2026-06-16 21:57 UTCUpdated Record last modified

bg guestbook bg guestbook DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy bg-guestbook || rpm -q bg-guestbook || bg-guestbook --version

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

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

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

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

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-2002-0457?

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

Is CVE-2002-0457 being exploited?

CVE-2002-0457 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-2002-0457 affect?

CVE-2002-0457 affects bg guestbook. Severity is high (CVSS 7.6). Cross-site scripting vulnerability in signgbook.php for BG GuestBook 1.0 allows remote attackers to execute arbitrary Javascript via encoded tags such as <, >, and & in fields such as (1) name, (2) email, (3) AIM screen name, (4)

How urgent is CVE-2002-0457?

Priority 47/100. High severity

Software pages

PHP vulnerabilities

References

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