How severe is CVE-2011-1903?

CVE-2011-1903 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2011-1903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1903?

CVE-2011-1903 primarily affects Proofpoint Messaging Security Gateway. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1903?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2011-1903 published?

CVE-2011-1903 was published on 2011-05-05 and last updated on 2026-06-16.

CVE-2011-1903

CVE-2011-1903 is a high-severity vulnerability in Proofpoint Messaging Security Gateway with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Proofpoint Messaging Security Gateway
Published: 2011-05-05
Last modified: 2026-06-16

Description

SQL injection vulnerability in an unspecified function in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier in Proofpoint Protection Server 5.5.3, 5.5.4, 5.5.5, 6.0.2, 6.1.1, and 6.2.0 allows remote attackers to execute arbitrary SQL commands via unknown vectors.

Frequently asked questions

What is CVE-2011-1903?: SQL injection vulnerability in an unspecified function in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier in Proofpoint Protection Server 5.5.3, 5.5.4, 5.5.5, 6.0.2, 6.1.1, and 6.2.0 allows remote attackers to execute arbitrary SQL commands via unknown vectors.
How severe is CVE-2011-1903?: CVE-2011-1903 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2011-1903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1903?: CVE-2011-1903 primarily affects Proofpoint Messaging Security Gateway. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-1903 published?: CVE-2011-1903 was published on 2011-05-05 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:proofpoint:messaging_security_gateway:*:*:*:*:*:*:*:*
cpe:2.3:a:proofpoint:protection_server:5.5.3:*:*:*:*:*:*:*
cpe:2.3:a:proofpoint:protection_server:5.5.4:*:*:*:*:*:*:*
cpe:2.3:a:proofpoint:protection_server:5.5.5:*:*:*:*:*:*:*
cpe:2.3:a:proofpoint:protection_server:6.0.2:*:*:*:*:*:*:*
cpe:2.3:a:proofpoint:protection_server:6.1.1:*:*:*:*:*:*:*
cpe:2.3:a:proofpoint:protection_server:6.2.0:*:*:*:*:*:*:*

More vulnerabilities in Proofpoint Messaging Security Gateway

CVE-2011-1904 — High (CVSS 7.5): An unspecified function in the web interface in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier…
CVE-2011-1901 — High (CVSS 7.5): The mail-filter web interface in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier in Proofpoint…
CVE-2011-1905 — Medium (CVSS 6.8): Multiple cross-site request forgery (CSRF) vulnerabilities in unspecified administrative modules in Proofpoint…
CVE-2011-1902 — Medium (CVSS 5.0): Directory traversal vulnerability in the web interface in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and…

All CVEs affecting Proofpoint Messaging Security Gateway →

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