CVE-2022-23653

MEDIUMNVD 4.74.7
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 4.7 under NVD CVSS v3. EPSS exploit probability: 0.2% (10th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this week
4.7EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

B2 Command Line Tool is the official command line tool for the backblaze cloud storage service. Linux and Mac releases of the B2 command-line tool version 3.2.0 and below contain a key disclosure vulnerability that, in certain conditions, can be exploited by local attackers through a time-of-check-time-of-use (TOCTOU) race condition. The command line tool saves API keys (and bucket name-to-id mapping) in a local database file ($XDG_CONFIG_HOME/b2/account_info, ~/.b2_account_info or a user-defined path) when b2 authorize-account is first run. This happens regardless of whether a valid key is provided or not. When first created, the file is world readable and is (typically a few milliseconds) later altered to be private to the user. If the directory is readable by a local attacker and the user did not yet run b2 authorize-account then during the brief period between file creation and permission modification, a local attacker can race to open the file and maintain a handle to it. This allows the local attacker to read the contents after the file after the sensitive information has been saved to it. Users that have not yet run b2 authorize-account should upgrade to B2 Command-Line Tool v3.2.1 before running it. Users that have run b2 authorize-account are safe if at the time of the file creation no other local users had read access to the local configuration file. Users that have run b2 authorize-account where the designated path could be opened by another local user should upgrade to B2 Command-Line Tool v3.2.1 and remove the database and regenerate all application keys. Note that b2 clear-account does not remove the database file and it should not be used to ensure that all open handles to the file are invalidated. If B2 Command-Line Tool cannot be upgraded to v3.2.1 due to a dependency conflict, a binary release can be used instead. Alternatively a new version could be installed within a virtualenv, or the permissions can be changed to prevent local users from opening the database file.

CVSS v3
4.7
EG Score
4.7MEDIUMmedium confidence
EG Risk
21
EG Risk 21/100

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)
Severity47% × 45%
Impact severity (EG Severity): CVSS 4.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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.
EPSS PROB
0.2%
EPSS %ILE
10th
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 (4.7): severity, escalated by confirmed exploitation. This CVE's 4.7 is its impact severity (EG Severity), not escalated.

EG Severity
4.7 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

February 23, 2022

Last Modified

November 21, 2024

References (2)

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
b20.3.14 ... 0.0.0 (44 versions)
  • every version up to 3.2.1: fixed in 3.2.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 33× 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 94 of 182 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. 6 repeat rows among the latest 100 are merged into the row they repeat. The 88 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  2. 2026-10-22 16:30 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  3. 2026-10-21 16:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  4. 2026-10-20 16:29 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-10-19 16:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  6. 2026-10-18 16:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  7. 2026-10-18 08:42 UTCEG score recompute
  8. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-10-17 04:24 UTCOSV refresh
  10. 2026-10-16 16:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  11. 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  13. 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  14. 2026-10-12 18:59 UTCEG score recompute
  15. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  16. 2026-10-11 23:25 UTCEG score recompute
  17. 2026-10-11 13:44 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-10-10 19:56 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  19. 2026-10-09 20:04 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  20. 2026-10-08 16:40 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  21. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  22. 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  23. 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  24. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  25. 2026-10-03 14:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
Show 69 more
  1. 2026-09-30 15:50 UTCEG score recompute
  2. 2026-09-30 15:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  3. 2026-09-29 15:15 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  4. 2026-09-28 13:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-09-27 13:41 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  6. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  7. 2026-09-25 04:54 UTCOSV refresh
  8. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  9. 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-09-17 19:23 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-09-15 03:06 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-09-13 16:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-09-12 14:57 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-09-11 14:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-09-11 09:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-09-07 15:58 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-09-05 20:30 UTCOSV refresh
  21. 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  26. 2026-08-30 19:14 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  27. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  28. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  29. 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  30. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  31. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  32. 2026-08-24 14:13 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  33. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  34. 2026-08-20 22:52 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  35. 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  36. 2026-08-19 07:32 UTCOSV refresh
  37. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  38. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  39. 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  40. 2026-08-16 02:11 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  41. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  42. 2026-08-13 21:57 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  43. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  44. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  45. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  46. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  47. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  48. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  49. 2026-08-04 10:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  50. 2026-08-04 03:27 UTCOSV refresh
  51. 2026-08-03 10:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  52. 2026-08-02 02:24 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  53. 2026-08-01 04:13 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  54. 2026-07-30 16:25 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  55. 2026-07-30 01:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  56. 2026-07-28 15:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  57. 2026-07-26 14:52 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  58. 2026-07-25 14:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  59. 2026-07-24 14:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  60. 2026-07-23 14:16 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  61. 2026-07-23 02:08 UTCEG score recompute
  62. 2026-07-22 22:55 UTCEG score recompute
  63. 2026-07-22 14:06 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  64. 2026-07-21 15:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  65. 2026-07-20 17:05 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  66. 2026-07-19 14:29 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  67. 2026-07-19 02:27 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  68. 2026-07-18 10:02 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  69. 2026-07-17 22:29 UTCOSV refresh

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Frequently asked(5)

What is CVE-2022-23653?
CVE-2022-23653 is a medium-severity vulnerability; its CVE record was published on February 23, 2022. B2 Command Line Tool is the official command line tool for the backblaze cloud storage service. Linux and Mac releases of the B2 command-line tool version 3.2.0 and below contain a key disclosure vulnerability that, in certain conditions, can be exploited by local attackers through a…
When was the CVE record for CVE-2022-23653 published?
The CVE record for CVE-2022-23653 was published on February 23, 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 November 21, 2024; the record at its source may have been updated since.
Is CVE-2022-23653 actively exploited?
CVE-2022-23653 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-23653?
CVE-2022-23653 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2022-23653?
A fix for CVE-2022-23653 is available: update to the fixed version the vendor names in its advisory.

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