CVE-2020-37255

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-20. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Elevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

WordPress Time Capsule Plugin 1.21.16 contains an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by sending a crafted POST request with the IWP_JSON_PREFIX header. Attackers can exploit this flaw to obtain valid administrator session cookies and access the WordPress dashboard without providing credentials.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
32.3%
KEV
Not listed

Published

June 20, 2026

Last Modified

July 15, 2026

Advisory Details (3)

Auto-updated Jun 20, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

WordPress Time Capsule Plugin 1.21.16 Authentication Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wordpress-time-capsule-plugin-authentication-bypass
generic🟡 PoC Available

WordPress Plugin Time Capsule 1.21.16 - Authentication Bypass - PHP webapps Exploit

https://www.exploit-db.com/exploits/47941
generic

WP Time Capsule - WordPress Backup + Staging and its incremental!

https://wptimecapsule.com/

Vendor Advisories for CVE-2020-37255(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 13× in last 7d / 90× 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. 2026-07-22 14:05 UTCEPSS rescore
  2. 2026-07-21 15:22 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
  4. 2026-07-20 17:04 UTCEPSS rescore
  5. 2026-07-20 17:04 UTCEPSS rescore
  6. 2026-07-19 14:28 UTCEPSS rescore
  7. 2026-07-19 14:28 UTCEPSS rescore
  8. 2026-07-19 02:26 UTCEPSS rescore
  9. 2026-07-19 02:26 UTCEPSS rescore
  10. 2026-07-16 22:15 UTCGHSA enrichment
  11. 2026-07-16 16:59 UTCEPSS rescore
  12. 2026-07-16 10:11 UTCGHSA enrichment
  13. 2026-07-15 22:20 UTCGHSA enrichment
  14. 2026-07-15 16:55 UTCEPSS rescore
  15. 2026-07-15 16:55 UTCEPSS rescore
  16. 2026-07-15 10:28 UTCGHSA enrichment
  17. 2026-07-15 01:57 UTCEPSS rescore
  18. 2026-07-14 22:19 UTCGHSA enrichment
  19. 2026-07-14 10:07 UTCGHSA enrichment
  20. 2026-07-13 22:27 UTCEPSS rescore
  21. 2026-07-13 22:27 UTCEPSS rescore
  22. 2026-07-13 22:10 UTCGHSA enrichment
  23. 2026-07-13 10:18 UTCGHSA enrichment
  24. 2026-07-13 06:10 UTCEPSS rescore
  25. 2026-07-13 06:10 UTCEPSS rescore
Show 71 more
  1. 2026-07-12 22:20 UTCGHSA enrichment
  2. 2026-07-12 10:29 UTCGHSA enrichment
  3. 2026-07-12 05:44 UTCEPSS rescore
  4. 2026-07-11 22:38 UTCGHSA enrichment
  5. 2026-07-11 10:46 UTCGHSA enrichment
  6. 2026-07-11 08:25 UTCEPSS rescore
  7. 2026-07-11 08:25 UTCEPSS rescore
  8. 2026-07-10 22:55 UTCGHSA enrichment
  9. 2026-07-10 11:04 UTCGHSA enrichment
  10. 2026-07-09 22:41 UTCGHSA enrichment
  11. 2026-07-09 19:07 UTCEPSS rescore
  12. 2026-07-09 10:50 UTCGHSA enrichment
  13. 2026-07-08 22:46 UTCGHSA enrichment
  14. 2026-07-08 15:12 UTCEPSS rescore
  15. 2026-07-08 10:55 UTCGHSA enrichment
  16. 2026-07-07 23:04 UTCGHSA enrichment
  17. 2026-07-07 13:43 UTCEPSS rescore
  18. 2026-07-07 11:13 UTCGHSA enrichment
  19. 2026-07-06 23:19 UTCGHSA enrichment
  20. 2026-07-06 16:25 UTCEPSS rescore
  21. 2026-07-06 16:25 UTCEPSS rescore
  22. 2026-07-06 11:28 UTCGHSA enrichment
  23. 2026-07-06 02:21 UTCEPSS rescore
  24. 2026-07-06 02:21 UTCEPSS rescore
  25. 2026-07-05 22:48 UTCGHSA enrichment
  26. 2026-07-05 10:57 UTCGHSA enrichment
  27. 2026-07-04 23:06 UTCGHSA enrichment
  28. 2026-07-04 11:14 UTCGHSA enrichment
  29. 2026-07-04 06:29 UTCEPSS rescore
  30. 2026-07-04 06:29 UTCEPSS rescore
  31. 2026-07-03 23:20 UTCGHSA enrichment
  32. 2026-07-03 11:29 UTCGHSA enrichment
  33. 2026-07-02 23:26 UTCGHSA enrichment
  34. 2026-07-02 11:35 UTCGHSA enrichment
  35. 2026-07-01 23:41 UTCGHSA enrichment
  36. 2026-07-01 11:50 UTCGHSA enrichment
  37. 2026-06-30 23:58 UTCGHSA enrichment
  38. 2026-06-30 23:20 UTCEPSS rescore
  39. 2026-06-30 23:20 UTCEPSS rescore
  40. 2026-06-30 12:07 UTCGHSA enrichment
  41. 2026-06-30 00:14 UTCGHSA enrichment
  42. 2026-06-29 14:04 UTCEPSS rescore
  43. 2026-06-29 12:23 UTCGHSA enrichment
  44. 2026-06-29 00:31 UTCGHSA enrichment
  45. 2026-06-28 12:39 UTCGHSA enrichment
  46. 2026-06-28 04:54 UTCEPSS rescore
  47. 2026-06-28 04:54 UTCEPSS rescore
  48. 2026-06-28 00:48 UTCGHSA enrichment
  49. 2026-06-27 12:57 UTCGHSA enrichment
  50. 2026-06-27 03:06 UTCEPSS rescore
  51. 2026-06-27 03:06 UTCEPSS rescore
  52. 2026-06-27 01:05 UTCGHSA enrichment
  53. 2026-06-26 13:14 UTCGHSA enrichment
  54. 2026-06-26 01:23 UTCGHSA enrichment
  55. 2026-06-25 13:48 UTCEPSS rescore
  56. 2026-06-25 13:31 UTCGHSA enrichment
  57. 2026-06-25 01:40 UTCGHSA enrichment
  58. 2026-06-24 14:03 UTCEPSS rescore
  59. 2026-06-24 14:03 UTCEPSS rescore
  60. 2026-06-24 13:49 UTCGHSA enrichment
  61. 2026-06-24 01:56 UTCGHSA enrichment
  62. 2026-06-23 21:31 UTCEPSS rescore
  63. 2026-06-23 21:31 UTCEPSS rescore
  64. 2026-06-23 14:04 UTCGHSA enrichment
  65. 2026-06-23 01:53 UTCGHSA enrichment
  66. 2026-06-22 14:01 UTCGHSA enrichment
  67. 2026-06-22 02:10 UTCGHSA enrichment
  68. 2026-06-21 14:16 UTCGHSA enrichment
  69. 2026-06-21 02:25 UTCGHSA enrichment
  70. 2026-06-20 14:34 UTCEG score recompute
  71. 2026-06-20 14:32 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2020-37255?
CVE-2020-37255 is a high vulnerability published on June 20, 2026. WordPress Time Capsule Plugin 1.21.16 contains an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by sending a crafted POST request with the IWPJSONPREFIX header. Attackers can exploit this flaw to obtain valid administrator session cookies…
When was CVE-2020-37255 disclosed?
CVE-2020-37255 was first published in the National Vulnerability Database on June 20, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-37255 actively exploited?
CVE-2020-37255 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-37255?
CVE-2020-37255 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2020-37255?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-37255, 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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