CVE-2002-1560: index.php in gBook 1.4 allows remote attackers to bypass authentication and gain administrative privileges by

This week

HIGH 10.0DOWNGRADE

CVE-2002-1560 is a high-severity flaw (CVSS 10.0) affecting gbook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

index.php in gBook 1.4 allows remote attackers to bypass authentication and gain administrative privileges by setting the login parameter to true.

Why this priority

Critical severity
EPSS top 4%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	10.3% (top 4%)
CISA exploited list	No
Published	2003-03-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: martin bauer

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

Am I affected?

Timeline

2003-03-31 05:00 UTCPublished CVE record published
2026-06-16 21:59 UTCUpdated Record last modified

martin bauer gbook DOWNGRADE

Affected: 1.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.4 (Debian / Ubuntu)

apt-cache madison gbook sudo apt install gbook=<VERSION_BEFORE_1.4> sudo apt-mark hold gbook

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

dnf --showduplicates list gbook sudo dnf downgrade gbook-<VERSION_BEFORE_1.4> sudo dnf versionlock add gbook

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: gBook 1.4 - Administrative Access

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-2002-1560?

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

Is CVE-2002-1560 being exploited?

CVE-2002-1560 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-2002-1560 affect?

CVE-2002-1560 affects gbook. Severity is high (CVSS 10.0). index.php in gBook 1.4 allows remote attackers to bypass authentication and gain administrative privileges by setting the login parameter to true.

How urgent is CVE-2002-1560?

Priority 64/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

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References

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