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Vulnerability record · CVE-2021-3694 · published 23 August 2021

CVE-2021-3694: Ledgersmb cross-site scripting vulnerability

Ledgersmb · Ledgersmb

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.

9.6 CVSS 3.1 Critical EPSS 2.5% · top 15.9% CWE-79 · Cross-site scripting
9.6CVSS 3.1 base score, v2 6.8
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
17 Jun 2026Last modified by 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.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ledgersmb/ledgersmb/commit/98fa476d46a4a7e5e9492ed69b4fa190be5547fc PatchThird Party Advisory
https://huntr.dev/bounties/ef7f4cf7-3a81-4516-b261-f5b6ac21430c Third Party Advisory
https://ledgersmb.org/cve-2021-3694-cross-site-scripting Vendor Advisory
https://www.debian.org/security/2021/dsa-4962 Third Party Advisory
https://github.com/ledgersmb/ledgersmb/commit/98fa476d46a4a7e5e9492ed69b4fa190be5547fc PatchThird Party Advisory
https://huntr.dev/bounties/ef7f4cf7-3a81-4516-b261-f5b6ac21430c Third Party Advisory
https://ledgersmb.org/cve-2021-3694-cross-site-scripting Vendor Advisory
https://www.debian.org/security/2021/dsa-4962 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-3694), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.