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Vulnerabilities

Vulnerability · CVE-2009-4804

Cross-site scripting (XSS) vulnerability in the Calendar Base (cal) extension before 1.1.1 for TYPO3, when Internet Explorer 6 is used, allows remote attackers to inje…

Published Apr 23, 2010 · catalog updated Jun 16, 2026 · mario matzulla calendar base

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2009-4804. EPSS is 1.03%. Act only if a listed version of mario matzulla calendar base is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.03%
Remediation
Version ranges on file
Affected products
cpe mario matzulla/calendar base

Cross-site scripting (XSS) vulnerability in the Calendar Base (cal) extension before 1.1.1 for TYPO3, when Internet Explorer 6 is used, allows remote attackers to inject arbitrary web script or HTML via "search parameters."

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe mario matzulla/calendar base0.10.0
  • cpe mario matzulla/calendar base0.11.0
  • cpe mario matzulla/calendar base0.12.0
  • cpe mario matzulla/calendar base0.12.1
  • cpe mario matzulla/calendar base0.9.0
  • cpe mario matzulla/calendar base<= 1.1.0

How to fix CVE-2009-4804

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2009-4804. EPSS is 1.03%. Act only if a listed version of mario matzulla calendar base is installed.

Which versions are affected?

Compare what you have installed with mario matzulla/calendar base 0.10.0; mario matzulla/calendar base 0.11.0; mario matzulla/calendar base 0.12.0; mario matzulla/calendar base 0.12.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 1.03%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

TYPO3 security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 23, 2010 · Monitored products — high

    Detected

    Cross-site scripting (XSS) vulnerability in the Calendar Base (cal) extension before 1.1.1 for TYPO3, when Internet Explorer 6 is used, allows remote attackers to inject arbitrary web script or HTML via "search parameters."

  2. Jun 16, 2026 · Monitored products — high

    Updated

    Cross-site scripting (XSS) vulnerability in the Calendar Base (cal) extension before 1.1.1 for TYPO3, when Internet Explorer 6 is used, allows remote attackers to inject arbitrary web script or HTML via "search parameters."

Sources

  • CVE.orgVulnerability recordCVE-2009-4804

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2009-4804

    Cross-site scripting (XSS) vulnerability in the Calendar Base (cal) extension before 1.1.1 for TYPO3, when Internet Explorer 6 is used, allows remote attackers to inject arbitrary web script or HTML via "search parameters."

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Monitored products — highNov 3, 2026