How severe is CVE-2011-1905?

CVE-2011-1905 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2011-1905 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1905?

CVE-2011-1905 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-2011-1905?

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

When was CVE-2011-1905 published?

CVE-2011-1905 was published on 2011-05-05 and last updated on 2026-06-16.

CVE-2011-1905

CVE-2011-1905 is a medium-severity vulnerability in Proofpoint Messaging Security Gateway with a CVSS 2.0 base score of 6.8. 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-352.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Proofpoint Messaging Security Gateway
Published: 2011-05-05
Last modified: 2026-06-16

Description

Multiple cross-site request forgery (CSRF) vulnerabilities in unspecified administrative modules 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 allow remote attackers to hijack the authentication of administrators via unknown vectors.

Frequently asked questions

What is CVE-2011-1905?: Multiple cross-site request forgery (CSRF) vulnerabilities in unspecified administrative modules 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 allow remote attackers to hijack the authentication of administrators via unknown vectors.
How severe is CVE-2011-1905?: CVE-2011-1905 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2011-1905 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1905?: CVE-2011-1905 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-2011-1905?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1905 published?: CVE-2011-1905 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-2011-1903 — High (CVSS 7.5): SQL injection vulnerability in an unspecified function in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and…
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-2011-1902 — 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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