CVE-2026-6456

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-20. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

The Account Switcher plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.0.2. This is due to the rememberLogin REST API endpoint using a loose comparison (!= instead of !==) for secret validation at app/RestAPI.php:111, combined with no validation that the secret is non-empty. When a target user has never used the "Remember me" feature, their asSecret user meta does not exist, causing get_user_meta() to return an empty string. An attacker can send an empty secret parameter, which passes the comparison ('' != '' is false), and the endpoint then calls wp_set_auth_cookie() for the target user. Additionally, all REST routes use permission_callback => '__return_true' with no capability checks. This makes it possible for authenticated attackers, with Subscriber-level access and above, to switch to any user account including Administrator, ultimately granting themselves full administrative privileges.

CVSS v3
8.8
EG Score
8.8(medium)
EPSS
30.7%
KEV
Not listed

Published

May 20, 2026

Last Modified

May 20, 2026

Advisory Details (1)

Auto-updated May 20, 2026
No patch confirmed yet.
generic

Account Switcher – WordPress plugin | WordPress.org

https://wordpress.org/plugins/account-switcher/

Vendor Advisories for CVE-2026-6456(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 11× in last 7d / 67× 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 159 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-6456?
CVE-2026-6456 is a high vulnerability published on May 20, 2026. The Account Switcher plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.0.2. This is due to the rememberLogin REST API endpoint using a loose comparison (!= instead of !==) for secret validation at app/RestAPI.php:111, combined with no validation that…
When was CVE-2026-6456 disclosed?
CVE-2026-6456 was first published in the National Vulnerability Database on May 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6456 actively exploited?
CVE-2026-6456 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6456?
CVE-2026-6456 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-6456?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6456, 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.

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