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CVE Record

CVE-2026-1909: WaveSurfer-WP <= 2.8.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'src' Shortcode Attribute

The WaveSurfer-WP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's audio shortcode in all versions up to, and including, 2.8.3 due to insufficient input sanitization and output escaping on the 'src' attribute. 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-2026-1909 affects the WaveSurfer-WP WordPress plugin. A logged-in user with Contributor-level access or higher can store malicious script through an audio shortcode attribute. That script can run when someone views the affected page. This is not reported as actively exploited in the provided sources.

Executive priority

Treat as a moderate-priority web risk. It requires an authenticated account, but WordPress Contributor accounts are common and often lower-trust. Prioritize sites with public content workflows, many contributors, or elevated business impact.

Technical view

Stored cross-site scripting in WaveSurfer-WP up to and including 2.8.3, caused by insufficient sanitization and output escaping of the audio shortcode 'src' attribute. CVSS 3.1 score is 6.4 with low privileges required and changed scope. CWE-79 applies.

Likely exposure

Exposure is limited to WordPress sites using WaveSurfer-WP version 2.8.3 or earlier, especially where Contributor-level or higher accounts are available to untrusted users or could be compromised.

Exploitation context

An attacker needs authenticated Contributor-level access or higher. The issue is stored, so impact occurs when users view injected content. The source bundle does not show CISA KEV listing or other evidence of active exploitation.

Researcher notes

The source bundle cites Wordfence, CVE records, and WordPress Trac references including a changeset. It does not clearly name a fixed release. The structured affected entry is sparse, so the narrative version range, up to and including 2.8.3, is the key exposure statement.

Mitigation direction

  • Check WordPress.org or vendor guidance for a fixed WaveSurfer-WP release.
  • Update the plugin promptly when a fixed version is available.
  • Restrict Contributor-level content creation to trusted accounts.
  • Review and remove suspicious WaveSurfer-WP shortcode content.
  • Disable the plugin temporarily if no fix is available and risk is unacceptable.

Validation and detection

  • Inventory WordPress sites for WaveSurfer-WP installations.
  • Confirm whether installed versions are 2.8.3 or earlier.
  • Review Contributor and higher accounts for unnecessary access.
  • Search site content for WaveSurfer-WP audio shortcodes with unusual src values.
  • Check security logs for unexpected content edits by low-privileged users.
Prepared
Confidence
high
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

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-2026-1909 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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
5Source 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-2026-1909Attack 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
x-raymWaveSurfer-WP0unaffected
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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