CVE-2026-11588

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2026-08-06. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.1Exploit: Elevated riskExposed services: Not assessed

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

The EONSR AEO Agent WordPress plugin through 3.7.9 does not perform any authorisation check on one of its REST API routes and disables HTML sanitisation before saving the post, allowing unauthenticated attackers to create administrator-attributed published posts containing arbitrary web scripts that execute in the browser of any visitor, including administrators (Stored XSS).

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
43
EG Risk 43/100CISA SSVC

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
Severity61% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 6, 2026

Last Modified

August 26, 2026

Advisory Details (1)

Auto-updated Aug 6, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

EONSR AEO Agent <= 3.7.9 – Unauthenticated Stored XSS via Scheduled Post Creation | CVE 2026-11588 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/31381157-63d6-4c26-bd52-2039a2e1a804/

Vendor Advisories for CVE-2026-11588(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 13× in last 7d / 65× 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.

Showing the most recent 100 of 154 total refreshes for this CVE.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 05:55 UTCEG score recompute
  3. 2026-10-04 05:55 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-02 09:48 UTCEG score recompute
  6. 2026-10-02 09:48 UTCGHSA enrichment
  7. 2026-10-01 19:49 UTCEPSS rescore
  8. 2026-10-01 01:50 UTCEG score recompute
  9. 2026-10-01 01:50 UTCGHSA enrichment
  10. 2026-09-30 15:02 UTCEPSS rescore
  11. 2026-09-29 15:20 UTCEPSS rescore
  12. 2026-09-29 06:04 UTCEG score recompute
  13. 2026-09-29 06:04 UTCGHSA enrichment
  14. 2026-09-28 13:50 UTCEPSS rescore
  15. 2026-09-27 17:37 UTCEG score recompute
  16. 2026-09-27 17:37 UTCGHSA enrichment
  17. 2026-09-26 15:58 UTCEPSS rescore
  18. 2026-09-25 04:28 UTCEG score recompute
  19. 2026-09-25 04:28 UTCGHSA enrichment
  20. 2026-09-23 22:00 UTCEG score recompute
  21. 2026-09-23 22:00 UTCGHSA enrichment
  22. 2026-09-23 13:47 UTCEPSS rescore
  23. 2026-09-22 23:58 UTCEG score recompute
  24. 2026-09-22 23:58 UTCGHSA enrichment
  25. 2026-09-22 01:20 UTCEG score recompute
Show 75 more
  1. 2026-09-22 01:20 UTCGHSA enrichment
  2. 2026-09-20 20:45 UTCEG score recompute
  3. 2026-09-20 20:45 UTCGHSA enrichment
  4. 2026-09-20 20:15 UTCEPSS rescore
  5. 2026-09-19 21:42 UTCEG score recompute
  6. 2026-09-19 21:42 UTCGHSA enrichment
  7. 2026-09-18 23:01 UTCEG score recompute
  8. 2026-09-18 23:01 UTCGHSA enrichment
  9. 2026-09-18 19:27 UTCEPSS rescore
  10. 2026-09-18 00:59 UTCEG score recompute
  11. 2026-09-18 00:59 UTCGHSA enrichment
  12. 2026-09-17 01:12 UTCEG score recompute
  13. 2026-09-17 01:12 UTCGHSA enrichment
  14. 2026-09-16 05:14 UTCEPSS rescore
  15. 2026-09-16 03:09 UTCEG score recompute
  16. 2026-09-16 03:09 UTCGHSA enrichment
  17. 2026-09-15 01:18 UTCGHSA enrichment
  18. 2026-09-13 21:31 UTCEG score recompute
  19. 2026-09-13 21:31 UTCGHSA enrichment
  20. 2026-09-13 16:46 UTCEPSS rescore
  21. 2026-09-12 23:29 UTCEG score recompute
  22. 2026-09-12 23:29 UTCGHSA enrichment
  23. 2026-09-12 15:00 UTCEPSS rescore
  24. 2026-09-12 00:25 UTCEG score recompute
  25. 2026-09-12 00:25 UTCGHSA enrichment
  26. 2026-09-11 14:52 UTCEPSS rescore
  27. 2026-09-11 09:36 UTCEPSS rescore
  28. 2026-09-11 02:23 UTCEG score recompute
  29. 2026-09-11 02:23 UTCGHSA enrichment
  30. 2026-09-10 09:34 UTCEPSS rescore
  31. 2026-09-10 04:21 UTCGHSA enrichment
  32. 2026-09-09 06:16 UTCEG score recompute
  33. 2026-09-09 06:16 UTCGHSA enrichment
  34. 2026-09-08 22:00 UTCEPSS rescore
  35. 2026-09-07 18:08 UTCEG score recompute
  36. 2026-09-07 18:08 UTCGHSA enrichment
  37. 2026-09-07 16:01 UTCEPSS rescore
  38. 2026-09-06 13:47 UTCEPSS rescore
  39. 2026-09-06 05:29 UTCEG score recompute
  40. 2026-09-06 05:29 UTCGHSA enrichment
  41. 2026-09-05 07:27 UTCEG score recompute
  42. 2026-09-05 07:27 UTCGHSA enrichment
  43. 2026-09-04 09:25 UTCEG score recompute
  44. 2026-09-04 09:25 UTCGHSA enrichment
  45. 2026-09-04 05:06 UTCEPSS rescore
  46. 2026-09-03 06:35 UTCEG score recompute
  47. 2026-09-03 06:35 UTCGHSA enrichment
  48. 2026-09-02 14:11 UTCEPSS rescore
  49. 2026-09-01 20:46 UTCEG score recompute
  50. 2026-09-01 20:46 UTCGHSA enrichment
  51. 2026-09-01 13:53 UTCEPSS rescore
  52. 2026-09-01 04:39 UTCEPSS rescore
  53. 2026-08-31 22:44 UTCEG score recompute
  54. 2026-08-31 22:44 UTCGHSA enrichment
  55. 2026-08-30 19:17 UTCEPSS rescore
  56. 2026-08-30 19:16 UTCEG score recompute
  57. 2026-08-30 19:16 UTCGHSA enrichment
  58. 2026-08-30 01:21 UTCEPSS rescore
  59. 2026-08-29 21:14 UTCEG score recompute
  60. 2026-08-29 21:14 UTCGHSA enrichment
  61. 2026-08-28 21:40 UTCEPSS rescore
  62. 2026-08-27 19:53 UTCEG score recompute
  63. 2026-08-27 19:53 UTCGHSA enrichment
  64. 2026-08-27 14:24 UTCEPSS rescore
  65. 2026-08-26 17:29 UTCEG score recompute
  66. 2026-08-26 17:29 UTCGHSA enrichment
  67. 2026-08-25 21:06 UTCEG score recompute
  68. 2026-08-25 21:06 UTCGHSA enrichment
  69. 2026-08-25 13:48 UTCEPSS rescore
  70. 2026-08-24 23:03 UTCEG score recompute
  71. 2026-08-24 23:03 UTCGHSA enrichment
  72. 2026-08-24 01:02 UTCGHSA enrichment
  73. 2026-08-23 02:59 UTCEG score recompute
  74. 2026-08-23 02:59 UTCGHSA enrichment
  75. 2026-08-23 00:19 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-11588?
CVE-2026-11588 is a medium vulnerability published on August 6, 2026. The EONSR AEO Agent WordPress plugin through 3.7.9 does not perform any authorisation check on one of its REST API routes and disables HTML sanitisation before saving the post, allowing unauthenticated attackers to create administrator-attributed published posts containing arbitrary web scripts…
When was CVE-2026-11588 disclosed?
CVE-2026-11588 was first published on August 6, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11588 actively exploited?
CVE-2026-11588 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-11588?
CVE-2026-11588 has a CVSS v3.1 base score of 6.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-11588?
No fix for CVE-2026-11588 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-11588 are linked in the Vendor Advisories panel on this page.

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