CVE-2026-88793

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-13. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

September 13, 2026

Last Modified

September 14, 2026

Advisory Details (1)

Auto-updated Sep 13, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

YouTube Embed 10.0 – 10.3 – Unauthenticated Stored XSS via youram_server | CVE 2026-88793 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/7f695b0c-5dbc-4f3e-9b3f-c3558b1729ad/

Vendor Advisories for CVE-2026-88793(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 31× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-20 07:12 UTCGHSA enrichment
  2. 2026-09-19 18:13 UTCEG score recompute
  3. 2026-09-19 18:13 UTCGHSA enrichment
  4. 2026-09-19 05:12 UTCEG score recompute
  5. 2026-09-19 05:12 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 16:13 UTCGHSA enrichment
  8. 2026-09-18 03:14 UTCEG score recompute
  9. 2026-09-18 03:14 UTCGHSA enrichment
  10. 2026-09-17 19:32 UTCEPSS rescore
  11. 2026-09-17 14:15 UTCGHSA enrichment
  12. 2026-09-17 01:14 UTCEG score recompute
  13. 2026-09-17 01:14 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 12:15 UTCEG score recompute
  16. 2026-09-16 12:15 UTCGHSA enrichment
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-15 23:16 UTCGHSA enrichment
  19. 2026-09-15 10:17 UTCEG score recompute
  20. 2026-09-15 10:16 UTCGHSA enrichment
  21. 2026-09-15 03:12 UTCEPSS rescore
  22. 2026-09-14 21:17 UTCGHSA enrichment
  23. 2026-09-14 13:29 UTCEG score recompute
  24. 2026-09-14 13:29 UTCGHSA enrichment
  25. 2026-09-14 12:45 UTCEG score recompute
Show 6 more
  1. 2026-09-14 12:45 UTCGHSA enrichment
  2. 2026-09-14 10:18 UTCEG score recompute
  3. 2026-09-14 10:18 UTCGHSA enrichment
  4. 2026-09-13 21:19 UTCEG score recompute
  5. 2026-09-13 20:24 UTCEG score recompute
  6. 2026-09-13 20:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-88793?
CVE-2026-88793 is a high vulnerability published on September 13, 2026. 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…
When was CVE-2026-88793 disclosed?
CVE-2026-88793 was first published in the National Vulnerability Database on September 13, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88793 actively exploited?
CVE-2026-88793 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.7% of all scored CVEs.
What is the CVSS score of CVE-2026-88793?
CVE-2026-88793 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-88793?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-88793, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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