CVE-2020-15906

CRITICALNVD 9.89.8
EchelonGraph scoreLOW confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 27%CVSS: 9.8Exploit: NoneExposed: 0

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

tiki-login.php in Tiki before 21.2 sets the admin password to a blank value after 50 invalid login attempts.

CVSS v3
9.8
EG Score
9.8(low)
EPSS
97.8%
KEV
Not listed

Published

October 22, 2020

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Jun 7, 2026
No patch confirmed yet.
generic

Security Releases of all Tiki versions since 16.3

https://info.tiki.org/article473-Security-Releases-of-all-Tiki-versions-since-16-3

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 35× 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. 2026-07-11 08:25 UTCEPSS rescore
  2. 2026-07-11 08:25 UTCEPSS rescore
  3. 2026-07-09 19:07 UTCEPSS rescore
  4. 2026-07-08 15:12 UTCEPSS rescore
  5. 2026-07-06 16:25 UTCEPSS rescore
  6. 2026-07-06 16:25 UTCEPSS rescore
  7. 2026-07-05 02:27 UTCEPSS rescore
  8. 2026-07-04 06:29 UTCEPSS rescore
  9. 2026-07-04 06:28 UTCEPSS rescore
  10. 2026-07-01 15:03 UTCEPSS rescore
  11. 2026-06-30 23:20 UTCEPSS rescore
  12. 2026-06-30 23:20 UTCEPSS rescore
  13. 2026-06-29 14:04 UTCEPSS rescore
  14. 2026-06-28 04:54 UTCEPSS rescore
  15. 2026-06-28 04:54 UTCEPSS rescore
  16. 2026-06-27 03:06 UTCEPSS rescore
  17. 2026-06-25 13:47 UTCEPSS rescore
  18. 2026-06-24 14:03 UTCEPSS rescore
  19. 2026-06-24 14:03 UTCEPSS rescore
  20. 2026-06-24 09:42 UTCOSV refresh
  21. 2026-06-23 21:31 UTCEPSS rescore
  22. 2026-06-23 21:31 UTCEPSS rescore
  23. 2026-06-22 14:23 UTCEPSS rescore
  24. 2026-06-22 14:23 UTCEPSS rescore
  25. 2026-06-21 01:57 UTCEPSS rescore
Show 37 more
  1. 2026-06-21 01:57 UTCEPSS rescore
  2. 2026-06-18 17:50 UTCEPSS rescore
  3. 2026-06-17 17:50 UTCEPSS rescore
  4. 2026-06-16 17:50 UTCEPSS rescore
  5. 2026-06-16 17:50 UTCEPSS rescore
  6. 2026-06-15 17:46 UTCEPSS rescore
  7. 2026-06-14 23:15 UTCEPSS rescore
  8. 2026-06-13 22:58 UTCEPSS rescore
  9. 2026-06-13 22:58 UTCEPSS rescore
  10. 2026-06-12 23:10 UTCEPSS rescore
  11. 2026-06-10 22:16 UTCEPSS rescore
  12. 2026-06-10 22:16 UTCEPSS rescore
  13. 2026-06-10 13:20 UTCEPSS rescore
  14. 2026-06-08 14:15 UTCEPSS rescore
  15. 2026-06-08 14:15 UTCEPSS rescore
  16. 2026-06-07 14:30 UTCOSV refresh
  17. 2026-06-06 13:45 UTCEPSS rescore
  18. 2026-06-06 13:45 UTCEPSS rescore
  19. 2026-06-05 22:45 UTCEPSS rescore
  20. 2026-06-05 22:45 UTCEPSS rescore
  21. 2026-06-05 06:08 UTCEPSS rescore
  22. 2026-06-05 06:08 UTCEPSS rescore
  23. 2026-06-04 13:10 UTCEPSS rescore
  24. 2026-06-04 13:10 UTCEPSS rescore
  25. 2026-06-02 20:11 UTCEPSS rescore
  26. 2026-06-02 20:11 UTCEPSS rescore
  27. 2026-05-31 00:15 UTCEPSS rescore
  28. 2026-05-31 00:15 UTCEPSS rescore
  29. 2026-05-28 13:43 UTCEPSS rescore
  30. 2026-05-28 13:43 UTCEPSS rescore
  31. 2026-05-26 13:42 UTCEPSS rescore
  32. 2026-05-26 13:42 UTCEPSS rescore
  33. 2026-05-26 07:17 UTCEPSS rescore
  34. 2026-05-26 07:17 UTCEPSS rescore
  35. 2026-05-24 16:48 UTCEPSS rescore
  36. 2026-05-23 06:12 UTCEG score recompute
  37. 2026-05-23 06:12 UTCGHSA enrichment

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCS1lkys/CVE-2020-15906
    First seen Jul 23, 2020

    Writeup of CVE-2020-15906

    Open source ↗
  • Nucleihttp/cves/2020/CVE-2020-15906.yaml
    First seen Jan 1, 2020

    Tiki Wiki CMS GroupWare - Authentication Bypass

    Open source ↗

Frequently asked(5)

What is CVE-2020-15906?
CVE-2020-15906 is a critical vulnerability published on October 22, 2020. tiki-login.php in Tiki before 21.2 sets the admin password to a blank value after 50 invalid login attempts.
When was CVE-2020-15906 disclosed?
CVE-2020-15906 was first published in the National Vulnerability Database on October 22, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-15906 actively exploited?
CVE-2020-15906 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-15906?
CVE-2020-15906 has a CVSS v3 base score of 9.8 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2020-15906?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-15906, 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.

Dependency Blast Radius

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