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
49%
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 10× in last 7d / 43× 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 229 total refreshes for this CVE.

  1. 2026-09-18 19:23 UTCEPSS rescore
  2. 2026-09-17 19:22 UTCEPSS rescore
  3. 2026-09-16 14:04 UTCEPSS rescore
  4. 2026-09-15 03:06 UTCEPSS rescore
  5. 2026-09-14 02:12 UTCEG score recompute
  6. 2026-09-14 02:12 UTCGHSA enrichment
  7. 2026-09-13 16:43 UTCEPSS rescore
  8. 2026-09-13 12:58 UTCEG score recompute
  9. 2026-09-13 12:58 UTCGHSA enrichment
  10. 2026-09-12 14:57 UTCEPSS rescore
  11. 2026-09-11 09:32 UTCEPSS rescore
  12. 2026-09-08 21:56 UTCEPSS rescore
  13. 2026-09-07 15:57 UTCEPSS rescore
  14. 2026-09-06 13:44 UTCEPSS rescore
  15. 2026-09-05 15:24 UTCEPSS rescore
  16. 2026-09-04 13:57 UTCEPSS rescore
  17. 2026-09-04 05:03 UTCEPSS rescore
  18. 2026-09-02 14:08 UTCEPSS rescore
  19. 2026-09-01 03:32 UTCEPSS rescore
  20. 2026-08-30 20:44 UTCEG score recompute
  21. 2026-08-30 20:44 UTCGHSA enrichment
  22. 2026-08-30 19:14 UTCEPSS rescore
  23. 2026-08-30 01:18 UTCEPSS rescore
  24. 2026-08-27 14:21 UTCEPSS rescore
  25. 2026-08-26 14:42 UTCEPSS rescore
Show 75 more
  1. 2026-08-25 13:45 UTCEPSS rescore
  2. 2026-08-25 01:50 UTCEG score recompute
  3. 2026-08-25 01:50 UTCGHSA enrichment
  4. 2026-08-24 13:59 UTCEG score recompute
  5. 2026-08-24 13:59 UTCGHSA enrichment
  6. 2026-08-23 23:16 UTCGHSA enrichment
  7. 2026-08-23 10:56 UTCEG score recompute
  8. 2026-08-23 10:56 UTCGHSA enrichment
  9. 2026-08-22 23:05 UTCEG score recompute
  10. 2026-08-22 23:05 UTCGHSA enrichment
  11. 2026-08-21 23:45 UTCEPSS rescore
  12. 2026-08-21 19:28 UTCGHSA enrichment
  13. 2026-08-21 07:37 UTCEG score recompute
  14. 2026-08-21 07:37 UTCGHSA enrichment
  15. 2026-08-20 22:52 UTCEPSS rescore
  16. 2026-08-20 19:46 UTCGHSA enrichment
  17. 2026-08-20 07:55 UTCEG score recompute
  18. 2026-08-20 07:55 UTCGHSA enrichment
  19. 2026-08-19 17:00 UTCEPSS rescore
  20. 2026-08-19 05:49 UTCEG score recompute
  21. 2026-08-19 05:49 UTCGHSA enrichment
  22. 2026-08-18 13:44 UTCEPSS rescore
  23. 2026-08-17 13:43 UTCEPSS rescore
  24. 2026-08-17 08:28 UTCGHSA enrichment
  25. 2026-08-16 20:37 UTCEG score recompute
  26. 2026-08-16 20:37 UTCGHSA enrichment
  27. 2026-08-16 14:52 UTCEPSS rescore
  28. 2026-08-16 08:46 UTCEG score recompute
  29. 2026-08-16 08:46 UTCGHSA enrichment
  30. 2026-08-16 02:11 UTCEPSS rescore
  31. 2026-08-15 20:55 UTCGHSA enrichment
  32. 2026-08-15 08:50 UTCEG score recompute
  33. 2026-08-15 08:50 UTCGHSA enrichment
  34. 2026-08-15 01:26 UTCEPSS rescore
  35. 2026-08-14 18:28 UTCGHSA enrichment
  36. 2026-08-14 06:36 UTCEG score recompute
  37. 2026-08-14 06:36 UTCGHSA enrichment
  38. 2026-08-13 21:57 UTCEPSS rescore
  39. 2026-08-13 18:45 UTCGHSA enrichment
  40. 2026-08-13 04:42 UTCGHSA enrichment
  41. 2026-08-12 16:51 UTCEG score recompute
  42. 2026-08-12 16:51 UTCGHSA enrichment
  43. 2026-08-12 13:47 UTCEPSS rescore
  44. 2026-08-12 05:00 UTCGHSA enrichment
  45. 2026-08-11 17:10 UTCEG score recompute
  46. 2026-08-11 17:09 UTCGHSA enrichment
  47. 2026-08-11 05:17 UTCGHSA enrichment
  48. 2026-08-10 17:26 UTCEG score recompute
  49. 2026-08-10 17:26 UTCGHSA enrichment
  50. 2026-08-10 04:21 UTCGHSA enrichment
  51. 2026-08-09 16:31 UTCEG score recompute
  52. 2026-08-09 16:31 UTCGHSA enrichment
  53. 2026-08-09 13:43 UTCEPSS rescore
  54. 2026-08-09 04:40 UTCGHSA enrichment
  55. 2026-08-08 16:49 UTCEG score recompute
  56. 2026-08-08 16:49 UTCGHSA enrichment
  57. 2026-08-08 16:33 UTCEPSS rescore
  58. 2026-08-08 04:58 UTCGHSA enrichment
  59. 2026-08-07 17:07 UTCEG score recompute
  60. 2026-08-07 17:07 UTCGHSA enrichment
  61. 2026-08-07 16:23 UTCEPSS rescore
  62. 2026-08-07 05:16 UTCGHSA enrichment
  63. 2026-08-06 17:25 UTCEG score recompute
  64. 2026-08-06 17:25 UTCGHSA enrichment
  65. 2026-08-06 13:43 UTCEPSS rescore
  66. 2026-08-06 05:34 UTCEG score recompute
  67. 2026-08-06 05:34 UTCGHSA enrichment
  68. 2026-08-05 17:43 UTCGHSA enrichment
  69. 2026-08-05 03:36 UTCGHSA enrichment
  70. 2026-08-04 15:17 UTCEG score recompute
  71. 2026-08-04 15:17 UTCGHSA enrichment
  72. 2026-08-04 10:34 UTCEPSS rescore
  73. 2026-08-03 19:52 UTCEG score recompute
  74. 2026-08-03 19:52 UTCGHSA enrichment
  75. 2026-08-03 08:01 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 51.3% 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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