CVE-2008-5065: TlGuestBook 1.2 allows remote attackers to bypass authentication and gain administrative access by setting the

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HIGH 7.5DOWNGRADE

CVE-2008-5065 is a high-severity flaw (CVSS 7.5) affecting tlguesbook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TlGuestBook 1.2 allows remote attackers to bypass authentication and gain administrative access by setting the tlGuestBook_login cookie to admin.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-287
Published	2008-11-13
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: easy-script

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

Am I affected?

Timeline

2008-11-13 17:24 UTCPublished CVE record published
2026-06-16 22:59 UTCUpdated Record last modified

easy-script tlguesbook DOWNGRADE

Affected: 1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2 (Debian / Ubuntu)

apt-cache madison tlguesbook sudo apt install tlguesbook=<VERSION_BEFORE_1.2> sudo apt-mark hold tlguesbook

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

dnf --showduplicates list tlguesbook sudo dnf downgrade tlguesbook-<VERSION_BEFORE_1.2> sudo dnf versionlock add tlguesbook

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: TlGuestBook 1.2 - Insecure Cookie Handling

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-2008-5065?

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

Is CVE-2008-5065 being exploited?

CVE-2008-5065 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-2008-5065 affect?

CVE-2008-5065 affects tlguesbook. Severity is high (CVSS 7.5). TlGuestBook 1.2 allows remote attackers to bypass authentication and gain administrative access by setting the tlGuestBook_login cookie to admin.

How urgent is CVE-2008-5065?

Priority 53/100. High severity; Public exploit reference

References

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