CVE-2008-7140: Multiple cross-site scripting (XSS) vulnerabilities in @lex Guestbook 4.0.5 and earlier allow remote attackers

Q: How do I fix CVE-2008-7140?

\@lex guestbook: upgrade to newer than 4.0.5. Exact commands for each OS are on this page.

Q: Is CVE-2008-7140 being exploited?

CVE-2008-7140 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2008-7140 affect?

CVE-2008-7140 affects \@lex guestbook. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in @lex Guestbook 4.0.5 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) language_setup parameter to setup.php or (2) test parameter to index.php. NOT

Q: How urgent is CVE-2008-7140?

Priority 39/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2008-7140 is a medium-severity flaw (CVSS 4.3) affecting \@lex guestbook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in @lex Guestbook 4.0.5 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) language_setup parameter to setup.php or (2) test parameter to index.php. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information. NOTE: a third party has been reported that the test parameter is not used in @lex Guestbook.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-79
Published	2009-09-01
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: alexguestbook

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

Am I affected?

Timeline

2009-09-01 16:30 UTCPublished CVE record published
2026-06-16 23:03 UTCUpdated Record last modified

alexguestbook \@lex guestbook UPGRADE

Affected: <= 4.0.5 · 3.12 · 3.13 · 4.0.1 · 4.0.2 · 4.0.4

Fixed in: newer than 4.0.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 4.0.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade lex-guestbook

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lex-guestbook

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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: @lex Guestbook 4.0.5 - 'index.php?test' Cross-Site Scripting
Exploit-DB: @lex Guestbook 4.0.5 - 'setup.php?language_setup' Cross-Site Scripting

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-2008-7140?

\@lex guestbook: upgrade to newer than 4.0.5. Exact commands for each OS are on this page.

Is CVE-2008-7140 being exploited?

CVE-2008-7140 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-2008-7140 affect?

CVE-2008-7140 affects \@lex guestbook. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in @lex Guestbook 4.0.5 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) language_setup parameter to setup.php or (2) test parameter to index.php. NOT

How urgent is CVE-2008-7140?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities

References

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