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CVE Record

CVE-2026-4084: fyyd podcast shortcodes <= 0.3.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'color' Shortcode Attribute

The fyyd podcast shortcodes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'fyyd-podcast', 'fyyd-episode', and 'fyyd' shortcodes in all versions up to, and including, 0.3.1. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes such as 'color', 'podcast_id', and 'podcast_slug'. These attributes are directly concatenated into inline JavaScript within single-quoted string arguments without any escaping or sanitization, allowing an attacker to break out of the JavaScript string context. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

MediumCVSS 6.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-4084 affects the WordPress plugin fyyd podcast shortcodes through version 0.3.1. A logged-in user with Contributor or higher access could save malicious script inside shortcode attributes. That script may run when someone views the affected page. Business risk is mainly site trust, user session exposure, and content integrity on WordPress sites using this plugin.

Executive priority

Treat as a timely WordPress hygiene issue, not an emergency unless many contributors are untrusted. Prioritize public sites with user-generated content workflows and administrative users who browse submitted posts.

Technical view

The issue is stored cross-site scripting in the 'fyyd-podcast', 'fyyd-episode', and 'fyyd' shortcodes. User-controlled attributes including 'color', 'podcast_id', and 'podcast_slug' are insufficiently sanitized and escaped before being concatenated into inline JavaScript single-quoted string arguments. CVSS is 6.4, CWE-79, with low privileges required and changed scope.

Likely exposure

Exposure is limited to WordPress sites with fyyd podcast shortcodes installed at version 0.3.1 or earlier, especially where untrusted users can create or edit posts as Contributors or above.

Exploitation context

The source bundle does not indicate CISA KEV listing or active exploitation. Exploitation requires an authenticated account with content-editing capability, then execution occurs when a user views the stored affected content.

Researcher notes

Evidence comes from the CVE description, Wordfence entry, and WordPress Trac code references. The provided sources identify affected versions up to 0.3.1 but do not name a fixed version or confirm exploitation in the wild.

Mitigation direction

  • Inventory WordPress sites for fyyd podcast shortcodes version 0.3.1 or earlier.
  • Check plugin and vendor guidance for a fixed release or official remediation.
  • Disable or remove the plugin if no safe version is available.
  • Restrict Contributor-level access to trusted users only.
  • Review posts and pages using fyyd shortcodes for suspicious attributes.

Validation and detection

  • Confirm whether the plugin is installed and identify its version.
  • Review WordPress roles for users with Contributor or higher permissions.
  • Locate content using fyyd-podcast, fyyd-episode, or fyyd shortcodes.
  • Check whether shortcode attributes are sanitized and escaped in the installed code.
  • Monitor security plugins or logs for alerts related to stored XSS.
Prepared
Confidence
high
Sources
8

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

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.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-4084 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

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.

1CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N3.12.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.4Medium
CVSS 3.1 vector shape for CVE-2026-4084Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
cbednarekfyyd podcast shortcodes0unaffected
Weakness

CWE details

CWE-79

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

CWE-79 · source CWE mapping

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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