How severe is CVE-2015-6509?

CVE-2015-6509 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-6509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6509?

CVE-2015-6509 affects Netgate Pfsense. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-6509?

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

When was CVE-2015-6509 published?

CVE-2015-6509 was published on 2015-08-18 and last updated on 2026-06-17.

CVE-2015-6509

CVE-2015-6509 is a medium-severity vulnerability in Netgate Pfsense 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: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Netgate Pfsense
Published: 2015-08-18
Last modified: 2026-06-17

Description

Multiple cross-site scripting (XSS) vulnerabilities in pfSense before 2.2.3 allow remote attackers to inject arbitrary web script or HTML via the (1) proxypass parameter to system_advanced_misc.php; (2) adaptiveend, (3) adaptivestart, (4) maximumstates, (5) maximumtableentries, or (6) aliasesresolveinterval parameter to system_advanced_firewall.php; (7) proxyurl, (8) proxyuser, or (9) proxyport parameter to system_advanced_misc.php; or (10) name, (11) notification_name, (12) ipaddress, (13) password, (14) smtpipaddress, (15) smtpport, (16) smtpfromaddress, (17) smtpnotifyemailaddress, (18) smtpusername, or (19) smtppassword parameter to system_advanced_notifications.php.

Frequently asked questions

What is CVE-2015-6509?: Multiple cross-site scripting (XSS) vulnerabilities in pfSense before 2.2.3 allow remote attackers to inject arbitrary web script or HTML via the (1) proxypass parameter to system_advanced_misc.php; (2) adaptiveend, (3) adaptivestart, (4) maximumstates, (5) maximumtableentries, or (6) aliasesresolveinterval parameter to system_advanced_firewall.php; (7) proxyurl, (8) proxyuser, or (9) proxyport parameter to system_advanced_misc.php; or (10) name, (11) notification_name, (12) ipaddress, (13) password, (14) smtpipaddress, (15) smtpport, (16) smtpfromaddress, (17) smtpnotifyemailaddress, (18) smtpusername, or (19) smtppassword parameter to system_advanced_notifications.php.
How severe is CVE-2015-6509?: CVE-2015-6509 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-6509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6509?: CVE-2015-6509 affects Netgate Pfsense. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-6509?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-6509 published?: CVE-2015-6509 was published on 2015-08-18 and last updated on 2026-06-17.

References

https://www.pfsense.org/security/advisories/pfSense-SA-15_06.webgui.asc

Affected products (1)

cpe:2.3:a:netgate:pfsense:*:*:*:*:*:*:*:*

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