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
8.8EG
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 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)
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
31%
KEV
Not listed

Published

May 20, 2026

Last Modified

July 24, 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 4× in last 7d / 73× 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 216 total refreshes for this CVE.

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

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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, with the most recent update on July 24, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 68.6% of all scored CVEs.
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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