CVE-2026-3220

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-18. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
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: Elevated riskExposed: 0

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

The Autoptimize WordPress plugin before 3.1.15, Clearfy Cache WordPress plugin before 2.4.2, Speed Optimizer WordPress plugin before 7.7.9 are vulnerable to unauthenticated Stored Cross-Site Scripting (XSS) due to a predictable replacement hash used during the HTML minification process and abusing a regular expression. This allows an attacker to inject arbitrary HTML attributes in the final HTML output by anticipating the placeholder format.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

May 18, 2026

Last Modified

May 18, 2026

Advisory Details (1)

Auto-updated May 18, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Multiple Plugins – Unauthenticated Stored XSS via Minify Library | CVE 2026-3220 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/3ceabf11-23cd-4c38-ba14-014348b0ff2d/

Vendor Advisories for CVE-2026-3220(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 25× 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 189 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-3220?
CVE-2026-3220 is a high vulnerability published on May 18, 2026. The Autoptimize WordPress plugin before 3.1.15, Clearfy Cache WordPress plugin before 2.4.2, Speed Optimizer WordPress plugin before 7.7.9 are vulnerable to unauthenticated Stored Cross-Site Scripting (XSS) due to a predictable replacement hash used during the HTML minification process and abusing…
When was CVE-2026-3220 disclosed?
CVE-2026-3220 was first published in the National Vulnerability Database on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-3220 actively exploited?
CVE-2026-3220 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 75.3% of all scored CVEs.
What is the CVSS score of CVE-2026-3220?
CVE-2026-3220 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-3220?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3220, 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

Explore the affected products and dependency analysis for CVE-2026-3220

Explore →

Is Your Infrastructure Affected by CVE-2026-3220?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs