How severe is CVE-2011-0550?

CVE-2011-0550 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2011-0550 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-2011-0550?

CVE-2011-0550 primarily affects Symantec Endpoint Protection. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0550?

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

When was CVE-2011-0550 published?

CVE-2011-0550 was published on 2011-08-15 and last updated on 2026-06-16.

CVE-2011-0550

CVE-2011-0550 is a medium-severity vulnerability in Symantec Endpoint Protection 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. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Symantec Endpoint Protection
Published: 2011-08-15
Last modified: 2026-06-16

Description

Multiple cross-site scripting (XSS) vulnerabilities in the Web Interface in the Endpoint Protection Manager in Symantec Endpoint Protection (SEP) 11.0.600x through 11.0.6300 allow remote attackers to inject arbitrary web script or HTML via (1) the token parameter to portal/Help.jsp or (2) the URI in a console/apps/sepm request.

Frequently asked questions

What is CVE-2011-0550?: Multiple cross-site scripting (XSS) vulnerabilities in the Web Interface in the Endpoint Protection Manager in Symantec Endpoint Protection (SEP) 11.0.600x through 11.0.6300 allow remote attackers to inject arbitrary web script or HTML via (1) the token parameter to portal/Help.jsp or (2) the URI in a console/apps/sepm request.
How severe is CVE-2011-0550?: CVE-2011-0550 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-0550 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-2011-0550?: CVE-2011-0550 primarily affects Symantec Endpoint Protection. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0550?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-0550 published?: CVE-2011-0550 was published on 2011-08-15 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:symantec:endpoint_protection:11.0.6000:*:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0.6100:*:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0.6200:*:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0.6200.754:*:*:*:*:*:*:*
cpe:2.3:a:symantec:endpoint_protection:11.0.6300:*:*:*:*:*:*:*

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