Is CVE-2021-3694 in the CISA KEV catalog?

No. CVE-2021-3694 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3694?

CVE-2021-3694 has a CVSS v3 base score of 8.2 (HIGH).

What is the EPSS score for CVE-2021-3694?

CVE-2021-3694 has an EPSS score of 2.39% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3694?

Upgrade ledgersmb on debian 11 to 1.6.9+ds-2+deb11u2 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3694

HIGHEPSS 82th pctl

8.2

CVSS v3

NVD

Description

LedgerSMB does not sufficiently HTML-encode error messages sent to the browser. By sending a specially crafted URL to an authenticated user, this flaw can be abused for remote code execution and information disclosure.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

ledgersmbDebian

Fixed in:1.6.9+ds-2+deb11u2CVE-2021-3694

Fixed in:1.6.9+ds-2.1CVE-2021-3694

ledgersmbUbuntu

Fixed in:1.3.46-1ubuntu0.1~esm1USN-7647-1

Fixed in:1.4.42+ds-1ubuntu0.1~esm1USN-7647-1

Fixed in:1.6.9+ds-1ubuntu0.1+esm1USN-7647-1

Fixed in:1.6.9+ds-1ubuntu0.1USN-5097-1

Fixed in:1.6.33+ds-1ubuntu0.1USN-7647-1

Fixed in:1.6.33+ds-2.1ubuntu0.1USN-7647-1

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 InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

2.39%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

ledgersmb.org

Third-Party Advisory2

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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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.