CVE-2020-37255

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM 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
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: Elevated riskExposed: 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(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
46%
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 15× in last 7d / 84× 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 106 total refreshes for this CVE.

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

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 1% probability of exploitation in the next 30 days, which ranks it in the top 53.5% of all scored CVEs.
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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