CVE-2021-42949

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-09-17. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2021-29904 (ENISA EUVD) · GHSA-87g3-rx63-rrch (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 7.4%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

The component controlla_login function in HotelDruid Hotel Management Software v3.0.3 generates a predictable session token, allowing attackers to bypass authentication via bruteforce attacks.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
62
EG Risk 62/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation7.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (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
7.4%
EPSS %ILE
94th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
7.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; 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 (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (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

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 16, 2022

Last Modified

June 3, 2025

Advisory Details (2)

Auto-updated Oct 9, 2026
Patch available.
Web page

HotelDruid: Hotel Management Software

https://www.hoteldruid.com/
Web page

GitHub - dhammon/HotelDruid-CVE-2021-42949 · GitHub

https://github.com/dhammon/HotelDruid-CVE-2021-42949

Affected Packages

(2 across 2 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
hoteldruid3.0.1-1 ... 3.0.8-1 (6 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
hoteldruid—
  • every version up to 3.0.4-1: fixed in 3.0.4-1
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 59× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 280 rows 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. None are among the latest 100 rows. The 180 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:41 UTCEPSS rescoreEPSS 7.4% · 94th percentile
  2. 2026-11-12 23:58 UTCEchelonGraph re-scored
  3. 2026-11-12 23:58 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-11-12 16:29 UTCEPSS rescoreEPSS 7.4% · 94th percentile
  5. 2026-11-12 00:25 UTCEchelonGraph re-scored
  6. 2026-11-12 00:25 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-11-11 16:31 UTCEPSS rescoreEPSS 7.4% · 94th percentile
  8. 2026-11-11 00:52 UTCEchelonGraph re-scored
  9. 2026-11-11 00:52 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-11-10 16:35 UTCEPSS rescoreEPSS 7.4% · 94th percentile
  11. 2026-11-10 01:18 UTCEchelonGraph re-scored
  12. 2026-11-10 01:18 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-11-09 16:29 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  14. 2026-11-09 01:45 UTCEchelonGraph re-scored
  15. 2026-11-09 01:45 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-11-08 16:33 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  17. 2026-11-08 02:12 UTCEchelonGraph re-scored
  18. 2026-11-08 02:12 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-11-07 16:34 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  20. 2026-11-07 02:31 UTCEchelonGraph re-scored
  21. 2026-11-07 02:31 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-11-06 16:30 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  23. 2026-11-06 02:58 UTCEchelonGraph re-scored
  24. 2026-11-06 02:58 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-11-05 16:31 UTCEPSS rescoreEPSS 7.3% · 94th percentile
Show 75 more
  1. 2026-11-05 03:25 UTCEchelonGraph re-scored
  2. 2026-11-05 03:25 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-04 16:30 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  4. 2026-11-04 03:52 UTCEchelonGraph re-scored
  5. 2026-11-04 03:52 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-11-03 20:55 UTCOSV refresh
  7. 2026-11-03 16:38 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  8. 2026-11-03 04:18 UTCEchelonGraph re-scored
  9. 2026-11-03 04:18 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-11-02 04:34 UTCEchelonGraph re-scored
  11. 2026-11-02 04:34 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-11-01 05:00 UTCEchelonGraph re-scored
  13. 2026-11-01 05:00 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-31 16:29 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  15. 2026-10-31 05:26 UTCEchelonGraph re-scored
  16. 2026-10-31 05:26 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-30 16:30 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  18. 2026-10-30 05:53 UTCEchelonGraph re-scored
  19. 2026-10-30 05:53 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-29 16:29 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  21. 2026-10-29 06:20 UTCEchelonGraph re-scored
  22. 2026-10-29 06:20 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-10-28 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  24. 2026-10-28 06:47 UTCEchelonGraph re-scored
  25. 2026-10-28 06:47 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  26. 2026-10-27 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  27. 2026-10-27 07:14 UTCEchelonGraph re-scored
  28. 2026-10-27 07:14 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  29. 2026-10-26 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  30. 2026-10-26 04:34 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  31. 2026-10-25 18:21 UTCEchelonGraph re-scored
  32. 2026-10-25 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  33. 2026-10-25 04:57 UTCEchelonGraph re-scored
  34. 2026-10-25 04:57 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  35. 2026-10-24 16:29 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  36. 2026-10-24 05:24 UTCEchelonGraph re-scored
  37. 2026-10-24 05:24 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  38. 2026-10-23 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  39. 2026-10-23 05:50 UTCEchelonGraph re-scored
  40. 2026-10-23 05:50 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  41. 2026-10-22 16:29 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  42. 2026-10-22 06:16 UTCEchelonGraph re-scored
  43. 2026-10-22 06:16 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  44. 2026-10-21 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  45. 2026-10-21 06:39 UTCEchelonGraph re-scored
  46. 2026-10-21 06:39 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  47. 2026-10-20 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  48. 2026-10-20 07:06 UTCEchelonGraph re-scored
  49. 2026-10-20 07:06 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-10-19 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  51. 2026-10-19 07:29 UTCEchelonGraph re-scored
  52. 2026-10-19 07:28 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  53. 2026-10-18 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  54. 2026-10-18 07:55 UTCEchelonGraph re-scored
  55. 2026-10-18 07:54 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  56. 2026-10-17 16:29 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  57. 2026-10-17 08:20 UTCEchelonGraph re-scored
  58. 2026-10-17 08:20 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  59. 2026-10-16 16:34 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  60. 2026-10-16 08:47 UTCEchelonGraph re-scored
  61. 2026-10-16 08:46 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  62. 2026-10-15 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  63. 2026-10-15 07:59 UTCEchelonGraph re-scored
  64. 2026-10-15 07:58 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-10-14 16:29 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  66. 2026-10-14 03:57 UTCEchelonGraph re-scored
  67. 2026-10-14 03:57 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  68. 2026-10-13 16:28 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  69. 2026-10-12 23:51 UTCGHSA enrichmentGHSA-87g3-rx63-rrch · GitHub severity CRITICAL · GitHub CVSS 9.8
  70. 2026-10-12 19:08 UTCEchelonGraph re-scored
  71. 2026-10-12 16:30 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  72. 2026-10-11 23:34 UTCEchelonGraph re-scored
  73. 2026-10-11 13:44 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  74. 2026-10-10 19:56 UTCEPSS rescoreEPSS 7.3% · 94th percentile
  75. 2026-10-09 20:04 UTCEPSS rescoreEPSS 7.3% · 94th percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2021-42949?
CVE-2021-42949 is a critical-severity vulnerability; its CVE record was published on September 16, 2022. The component controlla_login function in HotelDruid Hotel Management Software v3.0.3 generates a predictable session token, allowing attackers to bypass authentication via bruteforce attacks.
When was the CVE record for CVE-2021-42949 published?
The CVE record for CVE-2021-42949 was published on September 16, 2022. 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 June 3, 2025; the record at its source may have been updated since.
Is CVE-2021-42949 actively exploited?
CVE-2021-42949 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.4% probability of exploitation in the next 30 days (94th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-42949?
CVE-2021-42949 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-42949?
A fix for CVE-2021-42949 is available: update to the fixed version the vendor names in its advisory.

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