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Vulnerability record · CVE-2021-3693 · published 23 August 2021

CVE-2021-3693: Ledgersmb cross-site scripting vulnerability

Ledgersmb · Ledgersmb

LedgerSMB does not check the origin of HTML fragments merged into the browser's DOM. 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 3.2% · top 12.5% CWE-79 · Cross-site scripting
9.6CVSS 3.1 base score, v2 6.8
3.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

LedgerSMB does not check the origin of HTML fragments merged into the browser's DOM. 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://huntr.dev/bounties/daf1384d-648a-43fd-9b35-5c37d8ead667 Third Party Advisory
https://ledgersmb.org/cve-2021-3693-cross-site-scripting PatchVendor Advisory
https://www.debian.org/security/2021/dsa-4962 Third Party Advisory
https://huntr.dev/bounties/daf1384d-648a-43fd-9b35-5c37d8ead667 Third Party Advisory
https://ledgersmb.org/cve-2021-3693-cross-site-scripting PatchVendor Advisory
https://www.debian.org/security/2021/dsa-4962 Third Party Advisory

Track CVE-2021-3693 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-3693), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.