How severe is CVE-2009-1903?

CVE-2009-1903 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-1903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1903?

CVE-2009-1903 primarily affects Trustwave Modsecurity. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1903?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-1903 published?

CVE-2009-1903 was published on 2009-06-03 and last updated on 2026-06-16.

CVE-2009-1903

CVE-2009-1903 is a medium-severity vulnerability in Trustwave Modsecurity with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Trustwave Modsecurity
Published: 2009-06-03
Last modified: 2026-06-16

Description

The PDF XSS protection feature in ModSecurity before 2.5.8 allows remote attackers to cause a denial of service (Apache httpd crash) via a request for a PDF file that does not use the GET method.

Frequently asked questions

What is CVE-2009-1903?: The PDF XSS protection feature in ModSecurity before 2.5.8 allows remote attackers to cause a denial of service (Apache httpd crash) via a request for a PDF file that does not use the GET method.
How severe is CVE-2009-1903?: CVE-2009-1903 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-1903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1903?: CVE-2009-1903 primarily affects Trustwave Modsecurity. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-1903 published?: CVE-2009-1903 was published on 2009-06-03 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:trustwave:modsecurity:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:9:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:10:*:*:*:*:*:*:*

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