CVE-2026-8499

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-06-09. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

The Helpfulcrowd Product Reviews plugin for WordPress is vulnerable to Authorization Bypass via PHP Type Juggling in versions up to, and including, 1.2.9. This is due to the helpfulcrowd_validate_token() function using a loose comparison operator (!=) instead of a strict comparison (!==) when validating the token parameter, while the corresponding REST route /wp-json/helpfulcrowd/v1/update-settings is registered with a permission_callback of __return_true, making it reachable by unauthenticated users; submitting a JSON boolean true as the token value causes PHP's loose comparison to evaluate as equal to the non-empty base64-encoded secret string, bypassing the check entirely. This makes it possible for unauthenticated attackers to invoke helpfulcrowd_settings_endpoint() and write arbitrary attacker-controlled key-value pairs directly into the helpfulcrowd_options WordPress database option via update_option() without any sanitization or allowlist filtering, enabling full unauthenticated modification of the plugin's stored configuration.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

References (4)

Vendor Advisories for CVE-2026-8499(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 15× in last 7d / 56× 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.

  1. 2026-07-28 08:05 UTCEG score recompute
  2. 2026-07-28 08:05 UTCGHSA enrichment
  3. 2026-07-27 14:14 UTCEPSS rescore
  4. 2026-07-27 08:27 UTCEG score recompute
  5. 2026-07-27 08:27 UTCGHSA enrichment
  6. 2026-07-26 14:54 UTCEPSS rescore
  7. 2026-07-26 07:01 UTCEG score recompute
  8. 2026-07-26 07:01 UTCGHSA enrichment
  9. 2026-07-25 14:18 UTCEPSS rescore
  10. 2026-07-24 14:18 UTCEPSS rescore
  11. 2026-07-23 14:18 UTCEPSS rescore
  12. 2026-07-23 03:23 UTCEG score recompute
  13. 2026-07-22 14:08 UTCEPSS rescore
  14. 2026-07-21 15:25 UTCEPSS rescore
  15. 2026-07-21 15:25 UTCEPSS rescore
  16. 2026-07-20 17:08 UTCEPSS rescore
  17. 2026-07-19 14:31 UTCEPSS rescore
  18. 2026-07-19 02:29 UTCEPSS rescore
  19. 2026-07-18 10:04 UTCEPSS rescore
  20. 2026-07-16 17:03 UTCEPSS rescore
  21. 2026-07-15 20:27 UTCGHSA enrichment
  22. 2026-07-15 16:57 UTCEPSS rescore
  23. 2026-07-15 02:00 UTCEPSS rescore
  24. 2026-07-14 02:36 UTCGHSA enrichment
  25. 2026-07-13 22:31 UTCEPSS rescore
Show 74 more
  1. 2026-07-13 06:13 UTCEPSS rescore
  2. 2026-07-12 05:46 UTCEPSS rescore
  3. 2026-07-11 19:04 UTCGHSA enrichment
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-10 21:16 UTCGHSA enrichment
  6. 2026-07-09 19:10 UTCEPSS rescore
  7. 2026-07-08 23:59 UTCGHSA enrichment
  8. 2026-07-08 15:16 UTCEPSS rescore
  9. 2026-07-08 02:15 UTCGHSA enrichment
  10. 2026-07-07 13:46 UTCEPSS rescore
  11. 2026-07-07 13:46 UTCEPSS rescore
  12. 2026-07-06 16:27 UTCEPSS rescore
  13. 2026-07-06 16:27 UTCEPSS rescore
  14. 2026-07-06 02:23 UTCEPSS rescore
  15. 2026-07-06 02:23 UTCEPSS rescore
  16. 2026-07-05 15:56 UTCGHSA enrichment
  17. 2026-07-05 02:31 UTCEPSS rescore
  18. 2026-07-05 02:30 UTCEPSS rescore
  19. 2026-07-04 14:33 UTCGHSA enrichment
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-04 06:31 UTCEPSS rescore
  22. 2026-07-03 09:46 UTCGHSA enrichment
  23. 2026-07-02 12:01 UTCGHSA enrichment
  24. 2026-07-01 15:07 UTCEPSS rescore
  25. 2026-07-01 14:04 UTCGHSA enrichment
  26. 2026-06-30 23:22 UTCEPSS rescore
  27. 2026-06-30 16:19 UTCGHSA enrichment
  28. 2026-06-29 14:06 UTCEPSS rescore
  29. 2026-06-29 12:28 UTCGHSA enrichment
  30. 2026-06-28 14:44 UTCGHSA enrichment
  31. 2026-06-28 14:07 UTCEPSS rescore
  32. 2026-06-28 04:56 UTCEPSS rescore
  33. 2026-06-27 16:58 UTCGHSA enrichment
  34. 2026-06-27 03:08 UTCEPSS rescore
  35. 2026-06-26 19:13 UTCGHSA enrichment
  36. 2026-06-25 21:29 UTCGHSA enrichment
  37. 2026-06-25 13:50 UTCEPSS rescore
  38. 2026-06-24 23:45 UTCGHSA enrichment
  39. 2026-06-24 14:05 UTCEPSS rescore
  40. 2026-06-24 01:59 UTCGHSA enrichment
  41. 2026-06-23 21:33 UTCEPSS rescore
  42. 2026-06-23 04:15 UTCGHSA enrichment
  43. 2026-06-22 14:25 UTCEPSS rescore
  44. 2026-06-22 05:27 UTCGHSA enrichment
  45. 2026-06-21 14:56 UTCEPSS rescore
  46. 2026-06-21 01:59 UTCEPSS rescore
  47. 2026-06-21 01:56 UTCGHSA enrichment
  48. 2026-06-20 02:54 UTCGHSA enrichment
  49. 2026-06-19 19:26 UTCEPSS rescore
  50. 2026-06-19 05:07 UTCGHSA enrichment
  51. 2026-06-18 17:52 UTCEPSS rescore
  52. 2026-06-18 07:19 UTCGHSA enrichment
  53. 2026-06-17 17:53 UTCEPSS rescore
  54. 2026-06-17 08:35 UTCGHSA enrichment
  55. 2026-06-16 17:53 UTCEPSS rescore
  56. 2026-06-16 10:49 UTCGHSA enrichment
  57. 2026-06-15 17:49 UTCEPSS rescore
  58. 2026-06-15 17:49 UTCEPSS rescore
  59. 2026-06-15 13:05 UTCGHSA enrichment
  60. 2026-06-14 23:18 UTCEPSS rescore
  61. 2026-06-14 15:21 UTCGHSA enrichment
  62. 2026-06-13 23:00 UTCEPSS rescore
  63. 2026-06-13 17:37 UTCGHSA enrichment
  64. 2026-06-12 23:12 UTCEPSS rescore
  65. 2026-06-12 23:12 UTCEPSS rescore
  66. 2026-06-12 19:43 UTCGHSA enrichment
  67. 2026-06-11 21:59 UTCGHSA enrichment
  68. 2026-06-11 14:00 UTCEPSS rescore
  69. 2026-06-11 00:15 UTCGHSA enrichment
  70. 2026-06-10 22:19 UTCEPSS rescore
  71. 2026-06-10 13:22 UTCEPSS rescore
  72. 2026-06-10 02:31 UTCGHSA enrichment
  73. 2026-06-09 04:48 UTCEG score recompute
  74. 2026-06-09 04:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8499?
CVE-2026-8499 is a medium vulnerability published on June 9, 2026. The Helpfulcrowd Product Reviews plugin for WordPress is vulnerable to Authorization Bypass via PHP Type Juggling in versions up to, and including, 1.2.9. This is due to the helpfulcrowdvalidatetoken() function using a loose comparison operator (!=) instead of a strict comparison (!==) when…
When was CVE-2026-8499 disclosed?
CVE-2026-8499 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8499 actively exploited?
CVE-2026-8499 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 80.6% of all scored CVEs.
What is the CVSS score of CVE-2026-8499?
CVE-2026-8499 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-8499?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8499, 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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