CVE-2021-4171

Q: How do I fix CVE-2021-4171?

Upgrade calibre-web to 0.6.15 or later.

Q: Is CVE-2021-4171 being actively exploited?

Not that we know of. CVE-2021-4171 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 69% of all scored CVEs.

Q: How severe is CVE-2021-4171?

CVE-2021-4171 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2021-4171 affect?

Published advisories record a fix for calibre-web (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

CRITICAL

9.8

CVSS v3

NVD

Description

calibre-web is vulnerable to Business Logic Errors

CWE-840

How to fix

Remediation Available

calibre-webNVD

Affected:< 0.6.15Fixed in:0.6.15CVE-2021-4171derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.38%probability of exploitation in 30 days

69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Patch2

Related Vulnerabilities

Other CWE-840 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-22926	High	7.5	9.8%	-	Fix
CVE-2022-32207	Critical	9.8	6.9%	-	Fix
CVE-2022-32208	Medium	5.9	6.8%	-	Fix
CVE-2021-22922	Medium	6.5	4.3%	-	Fix
CVE-2021-22897	Medium	5.3	3.0%	-	Fix
CVE-2022-27782	High	7.5	2.8%	-	Fix

Common questions

How do I fix CVE-2021-4171?

Upgrade calibre-web to 0.6.15 or later.

Is CVE-2021-4171 being actively exploited?

Not that we know of. CVE-2021-4171 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 69% of all scored CVEs.

How severe is CVE-2021-4171?

CVE-2021-4171 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2021-4171 affect?

Published advisories record a fix for calibre-web (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2021-4171

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.