CVE-2020-26253

MEDIUMNVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.8 under NVD CVSS v3. EPSS exploit probability: 0.6% (44th percentile of EPSS-scored CVEs). 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: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
6.8EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 6.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Kirby is a CMS. In Kirby CMS (getkirby/cms) before version 3.3.6, and Kirby Panel before version 2.5.14 there is a vulnerability in which the admin panel may be accessed if hosted on a .dev domain. In order to protect new installations on public servers that don't have an admin account for the Panel yet, we block account registration there by default. This is a security feature, which we implemented years ago in Kirby 2. It helps to avoid that you forget registering your first admin account on a public server. In this case – without our security block – someone else might theoretically be able to find your site, find out it's running on Kirby, find the Panel and then register the account first. It's an unlikely situation, but it's still a certain risk. To be able to register the first Panel account on a public server, you have to enforce the installer via a config setting. This helps to push all users to the best practice of registering your first Panel account on your local machine and upload it together with the rest of the site. This installation block implementation in Kirby versions before 3.3.6 still assumed that .dev domains are local domains, which is no longer true. In the meantime, those domains became publicly available. This means that our installation block is no longer working as expected if you use a .dev domain for your Kirby site. Additionally the local installation check may also fail if your site is behind a reverse proxy. You are only affected if you use a .dev domain or your site is behind a reverse proxy and you have not yet registered your first Panel account on the public server and someone finds your site and tries to login at yourdomain.dev/panel before you register your first account. You are not affected if you have already created one or multiple Panel accounts (no matter if on a .dev domain or behind a reverse proxy). The problem has been patched in Kirby 3.3.6. Please upgrade to this or a later version to fix the vulnerability.

CVSS v3
6.8
EG Score
6.8MEDIUMmedium confidence
EG Risk
35
EG Risk 35/100

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 (value × EchelonGraph’s weight)
Severity68% × 45%
The EG Score, 6.8 of 10.
Exploitation0.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability30% × 15%
EchelonGraph's default before algorithm v3.4: CISA had not published Automatable for this CVE.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

Published

December 8, 2020

Last Modified

November 21, 2024

References (5)

Affected Packages

(2 across 1 ecosystem)
Packagist(2)
PackageVulnerable rangeFix by version rangeDependents
getkirby/cms3.0.0 ... 3.3.5-rc.1 (49 versions)
  • 3.0.0 up to 3.3.6: fixed in 3.3.6
—
getkirby/panel2.4.0 ... 2.5.9-RC-2 (24 versions)
  • every version up to 2.5.14: fixed in 2.5.14
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 27× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 89 of 154 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 11 repeat rows among the latest 100 are merged into the row they repeat. The 65 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 13:43 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  2. 2026-10-10 19:56 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  3. 2026-10-09 20:04 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  4. 2026-10-09 13:55 UTCOSV refresh
  5. 2026-10-08 16:38 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  6. 2026-10-07 23:44 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  7. 2026-10-06 15:13 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  8. 2026-10-05 17:39 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  9. 2026-10-04 23:18 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  10. 2026-10-03 14:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  11. 2026-09-30 15:16 UTCEG score recompute
  12. 2026-09-30 14:59 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  13. 2026-09-29 15:14 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  14. 2026-09-27 13:41 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  15. 2026-09-26 15:54 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  16. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  17. 2026-09-22 14:43 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  18. 2026-09-21 20:28 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  19. 2026-09-20 20:11 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  20. 2026-09-19 21:03 UTCOSV refresh
  21. 2026-09-19 15:37 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  22. 2026-09-18 19:23 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  23. 2026-09-17 19:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  24. 2026-09-16 14:04 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  25. 2026-09-15 03:06 UTCEPSS rescoreEPSS 0.6% · 45th percentile
Show 64 more
  1. 2026-09-13 16:43 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  2. 2026-09-12 14:57 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  3. 2026-09-11 09:32 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  4. 2026-09-08 21:56 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  5. 2026-09-07 15:57 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  6. 2026-09-06 13:44 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  7. 2026-09-05 15:24 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  8. 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  9. 2026-09-04 05:03 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  10. 2026-09-02 14:08 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  11. 2026-09-01 03:32 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  12. 2026-09-01 00:34 UTCOSV refresh
  13. 2026-08-30 19:14 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  14. 2026-08-30 01:18 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  15. 2026-08-27 14:21 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  16. 2026-08-26 14:42 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  17. 2026-08-25 13:45 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  18. 2026-08-21 23:45 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  19. 2026-08-20 22:52 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  20. 2026-08-19 17:00 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  21. 2026-08-18 13:44 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  22. 2026-08-17 13:43 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  23. 2026-08-16 14:52 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  24. 2026-08-16 02:11 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  25. 2026-08-15 01:26 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  26. 2026-08-15 00:54 UTCOSV refresh
  27. 2026-08-13 21:57 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  28. 2026-08-12 13:47 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  29. 2026-08-09 13:43 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  30. 2026-08-08 16:33 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  31. 2026-08-07 16:23 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  32. 2026-08-06 13:43 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  33. 2026-08-04 15:06 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  34. 2026-08-04 10:34 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  35. 2026-08-02 02:23 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  36. 2026-08-01 04:12 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  37. 2026-07-30 16:25 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  38. 2026-07-30 13:14 UTCOSV refresh
  39. 2026-07-30 01:27 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  40. 2026-07-28 15:33 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  41. 2026-07-26 14:51 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  42. 2026-07-25 14:15 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  43. 2026-07-24 14:14 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  44. 2026-07-23 14:15 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  45. 2026-07-23 01:51 UTCEG score recompute
  46. 2026-07-22 22:37 UTCEG score recompute
  47. 2026-07-22 14:05 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  48. 2026-07-21 15:22 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  49. 2026-07-20 17:04 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  50. 2026-07-19 14:28 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  51. 2026-07-19 02:26 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  52. 2026-07-16 16:59 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  53. 2026-07-15 16:55 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  54. 2026-07-15 01:57 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  55. 2026-07-13 22:27 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  56. 2026-07-13 06:10 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  57. 2026-07-12 22:08 UTCOSV refresh
  58. 2026-07-12 05:44 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  59. 2026-07-11 08:25 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  60. 2026-07-09 19:07 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  61. 2026-07-08 15:12 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  62. 2026-07-07 13:43 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  63. 2026-07-06 16:25 UTCEPSS rescoreEPSS 0.6% · 42nd percentile
  64. 2026-07-06 02:21 UTCEPSS rescoreEPSS 0.6% · 42nd percentile

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Frequently asked(5)

What is CVE-2020-26253?
CVE-2020-26253 is a medium-severity vulnerability; its CVE record was published on December 8, 2020. Kirby is a CMS. In Kirby CMS (getkirby/cms) before version 3.3.6, and Kirby Panel before version 2.5.14 there is a vulnerability in which the admin panel may be accessed if hosted on a .dev domain. In order to protect new installations on public servers that don't have an admin account for the…
When was the CVE record for CVE-2020-26253 published?
The CVE record for CVE-2020-26253 was published on December 8, 2020. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2020-26253 actively exploited?
CVE-2020-26253 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-26253?
CVE-2020-26253 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2020-26253?
A fix for CVE-2020-26253 is available: update to the fixed version the vendor names in its advisory.

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