CVE-2009-1620: Multiple cross-site scripting (XSS) vulnerabilities in input.php in MataChat allow remote attackers to inject

Routine

MEDIUM 4.3MITIGATE

CVE-2009-1620 is a medium-severity flaw (CVSS 4.3) affecting matachat. 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 input.php in MataChat allow remote attackers to inject arbitrary web script or HTML via the (1) nickname and (2) color parameters.

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	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-79
Published	2009-05-12
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mata

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

Am I affected?

Timeline

2009-05-12 16:30 UTCPublished CVE record published
2026-06-16 23:07 UTCUpdated Record last modified

mata matachat MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

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

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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: MataChat - 'input.php' Multiple Cross-Site Scripting Vulnerabilities

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-2009-1620?

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

Is CVE-2009-1620 being exploited?

CVE-2009-1620 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-2009-1620 affect?

CVE-2009-1620 affects matachat. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in input.php in MataChat allow remote attackers to inject arbitrary web script or HTML via the (1) nickname and (2) color parameters.

How urgent is CVE-2009-1620?

Priority 37/100. Public exploit reference

Software pages

PHP vulnerabilities

References

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