Security readout for executives and security teams
Plain-English summary
CVE-2015-6509 covers multiple cross-site scripting flaws in pfSense WebGUI before 2.2.3. A remote attacker could inject script or HTML through specific advanced firewall, proxy, and notification settings fields. Business risk is highest if the management interface is reachable by untrusted users or exposed to the internet.
Executive priority
Treat as a priority cleanup for legacy pfSense systems. Escalate quickly if any affected WebGUI is internet-facing or accessible beyond a controlled admin network.
Technical view
The record lists reflected or stored XSS vectors across system_advanced_misc.php, system_advanced_firewall.php, and system_advanced_notifications.php parameters. The source bundle does not provide CVSS, CWE, authentication requirements, or exploitability details. The affected scope is pfSense versions before 2.2.3.
Likely exposure
Organizations running pfSense before 2.2.3 are potentially exposed, especially where WebGUI access is not tightly restricted to trusted administrators or management networks.
Exploitation context
The CVE states remote attackers can inject arbitrary web script or HTML. No provided source says this is actively exploited, and it is not listed as KEV in the bundle.
Researcher notes
Evidence is limited to the CVE entry and pfSense advisory reference. The bundle names affected parameters but does not include CVSS, CWE mapping, authentication context, or proof of active exploitation.
Mitigation direction
- Upgrade pfSense to 2.2.3 or later.
- Review the pfSense advisory for vendor-specific guidance.
- Restrict WebGUI access to trusted management networks.
- Remove internet exposure for firewall administration interfaces.
- Audit administrator accounts and recent configuration changes.
Validation and detection
- Inventory pfSense systems and record their versions.
- Confirm no pfSense instance is earlier than 2.2.3.
- Check whether WebGUI is reachable from untrusted networks.
- Review affected advanced settings pages for suspicious values.
- Verify monitoring covers firewall administration changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2015-6509 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.pfsense.org/security/advisories/pfSense-SA-15_06.webgui.ascCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.