CVE-2026-18316

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-16. A secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.1Exploit: None knownExposed services: Not assessed

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

The Solace Extra plugin for WordPress is vulnerable to unauthorized modification and loss of data due to a missing capability check on the import_zip() function in versions up to, and including, 1.6.0. The handler is registered on both wp_ajax_action-import-zip and wp_ajax_nopriv_action-import-zip and only verifies the 'ajax-nonce' nonce, which is emitted on every admin page via wp_localize_script (unrestricted admin_enqueue_scripts hook) and is therefore accessible to any authenticated user including Subscribers. This makes it possible for authenticated attackers, with Subscriber-level access and above, to wipe navigation menus, sidebar widgets (via update_option('sidebars_widgets', array())), all theme mods (via remove_theme_mods()), and Elementor templates, as well as trigger arbitrary demo-content imports.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100CISA 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
Severity91% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend 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 at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.6%
EPSS %ILE
46th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend 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 at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (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 16, 2026

Last Modified

August 20, 2026

References (5)

Vendor Advisories for CVE-2026-18316(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 36× in last 7d / 190× 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 358 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18316?
CVE-2026-18316 is a critical vulnerability published on August 16, 2026. The Solace Extra plugin for WordPress is vulnerable to unauthorized modification and loss of data due to a missing capability check on the importzip() function in versions up to, and including, 1.6.0. The handler is registered on both wpajaxaction-import-zip and wpajaxnoprivaction-import-zip and…
When was CVE-2026-18316 disclosed?
CVE-2026-18316 was first published on August 16, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18316 actively exploited?
CVE-2026-18316 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18316?
CVE-2026-18316 has a CVSS base score of 9.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18316?
No fix for CVE-2026-18316 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-2026-18316 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-18316

Explore →

Is Your Infrastructure Affected by CVE-2026-18316?

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

Book a Demo →Browse All CVEs