CVE-2009-4767: Multiple cross-site scripting (XSS) vulnerabilities in index.php in Plohni Shoutbox 1.0 allow remote attackers

Routine

MEDIUM 4.3DOWNGRADE

CVE-2009-4767 is a medium-severity flaw (CVSS 4.3) affecting shoutbox. 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 index.php in Plohni Shoutbox 1.0 allow remote attackers to inject arbitrary web script or HTML via the (1) input_name and (2) input_text parameters. NOTE: some of these details are obtained from third party information.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-79
Published	2010-04-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: plohni

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

Am I affected?

Timeline

2010-04-20 14:30 UTCPublished CVE record published
2026-06-16 23:14 UTCUpdated Record last modified

plohni shoutbox 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 shoutbox || rpm -q shoutbox || shoutbox --version

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

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

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

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

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: Shoutbox 1.0 - HTML / Cross-Site Scripting Injection

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-2009-4767?

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

Is CVE-2009-4767 being exploited?

CVE-2009-4767 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-2009-4767 affect?

CVE-2009-4767 affects shoutbox. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in index.php in Plohni Shoutbox 1.0 allow remote attackers to inject arbitrary web script or HTML via the (1) input_name and (2) input_text parameters. NOTE: some of these details are obta

How urgent is CVE-2009-4767?

Priority 38/100. Public exploit reference

Software pages

PHP vulnerabilities

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References

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