CVE-2023-2106Public exploitNetwork attack vector

Account compromise via unrestricted weak passwords

Published Apr 15, 2023 · Updated Feb 6, 2025

Weak password requirements in Calibre-Web before 0.6.20 allow remote attackers to compromise accounts through easily guessed credentials. Password creation and change paths accept arbitrary passwords without enforcing length, complexity, or character-class requirements. Exposure requires an account to use a guessable password, and resulting access is limited to that account's assigned permissions.

CVSS severity7.3
High
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak password requirements in Calibre-Web before 0.6.20 allow remote attackers to compromise accounts through easily guessed credentials. Password creation and change paths accept arbitrary passwords without enforcing length, complexity, or character-class requirements. Exposure requires an account to use a guessable password, and resulting access is limited to that account's assigned permissions.

The record

CVE
CVE-2023-2106
Published
Apr 15, 2023
Updated
Feb 6, 2025
Vendor
Calibre-Web
Product
Calibre-Web
Classifications
CWE-521, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <0.6.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Calibre-Web · Calibre-Webversion=unspecified <0.6.20

Published CVSS scores

7.3huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-521Weak Password Requirements
T1110.001Brute Force Password Guessing

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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