YouTube Embed 10.0 - 10.3 - Unauthenticated Stored XSS via youram_server (CVE-2026-88793) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-88793

YouTube Embed 10.0 - 10.3 - Unauthenticated Stored XSS via youram_server

Answer in brief

CVE-2026-88793 records a Unknown severity vulnerability in YouTube Embed 10.0 - 10.3 - Unauthenticated Stored XSS via youram_server. The current sources do not mark it as known exploited. The current feed maps Unknown/YouTube Embed (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 13, 2026Updated Sep 13, 2026Source checked Sep 13, 2026First seen by HOL Sep 13, 2026Material review Sep 13, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/YouTube Embed (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/YouTube Embedgeneric	10.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/YouTube Embed.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 13, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source description

The YouTube Embed WordPress plugin from 10.0 to 10.3 does not perform any authorisation check on one of its AJAX actions, relying only on a nonce it prints on every front-end page, and does not escape the stored data before rendering it, allowing unauthenticated attackers to store arbitrary web scripts which will execute in the session of any user viewing the affected content, including an administrator.

Quoted source text, attributed separately from HOL analysis.