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CVE Record

CVE-2015-9539: The Fast Secure Contact Form plugin before 4.0.38 for WordPress allows fs_contact_form1[welcome] XSS.

The Fast Secure Contact Form plugin before 4.0.38 for WordPress allows fs_contact_form1[welcome] XSS.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a cross-site scripting issue in the Fast Secure Contact Form WordPress plugin before 4.0.38. A vulnerable site could let attacker-controlled script run in a user's browser through the plugin's welcome field handling. The sources do not provide CVSS, broad affected metadata, or evidence of active exploitation.

Executive priority

Treat this as a targeted hygiene issue for legacy WordPress assets, not as confirmed emergency exploitation. Prioritize internet-facing sites and any business-critical WordPress properties still running old plugins.

Technical view

CVE-2015-9539 describes XSS involving the fs_contact_form1[welcome] parameter in Fast Secure Contact Form versions before 4.0.38 for WordPress. The bundle does not state whether the XSS is stored or reflected, does not assign a CWE, and does not include detailed patch notes beyond the version boundary.

Likely exposure

Exposure is most likely limited to WordPress sites that installed Fast Secure Contact Form before version 4.0.38. Sites without this plugin, or running 4.0.38 or later, are not identified as affected by the provided sources.

Exploitation context

The vulnerability is publicly documented, including the affected parameter, but the provided sources and KEV status do not support a claim of active exploitation. Public disclosure alone increases validation urgency for any legacy WordPress estates still using this plugin.

Researcher notes

The record is sparse: no CVSS, CWE, CPE, or exploit-status evidence is supplied. Analysis should avoid assuming exploitability details beyond XSS in fs_contact_form1[welcome] and the stated pre-4.0.38 affected version range.

Mitigation direction

  • Inventory WordPress sites for Fast Secure Contact Form installations.
  • Upgrade the plugin to version 4.0.38 or later where available.
  • Remove or replace the plugin if a supported fixed version is unavailable.
  • Review plugin welcome-field content for unexpected scripts or markup.
  • Check vendor or project guidance before applying compensating controls.

Validation and detection

  • Confirm each WordPress site's installed plugin version.
  • Flag any Fast Secure Contact Form version earlier than 4.0.38.
  • Verify the welcome field safely renders user-controlled text.
  • Review web and CMS logs for suspicious plugin-related requests.
  • Document affected sites, remediation status, and residual risk.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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CVE-2015-9539 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.