CVE-2021-3694
CRITICALCVSS 9.6/10EPSS 2.39%
Last modified
CVE-2021-3694 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. 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.. EPSS estimates a 2.39% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ledgersmb | Ledgersmb | >= 1.1.0, <= 1.1.12 |
| Ledgersmb | Ledgersmb | >= 1.2.0, <= 1.2.26 |
| Ledgersmb | Ledgersmb | >= 1.3.0, <= 1.3.47 |
| Ledgersmb | Ledgersmb | >= 1.4.0, <= 1.4.42 |
| Ledgersmb | Ledgersmb | >= 1.5.0, <= 1.5.30 |
| Ledgersmb | Ledgersmb | >= 1.6.0, <= 1.6.33 |
| Ledgersmb | Ledgersmb | >= 1.7.0, <= 1.7.32 |
| Ledgersmb | Ledgersmb | >= 1.8.0, <= 1.8.17 |
| Debian | Debian Linux | 10.0 |
| Debian | Debian Linux | 11.0 |
References
- https://github.com/ledgersmb/ledgersmb/commit/98fa476d46a4a7e5e9492ed69b4fa190be5547fcPatch, Third Party Advisory
- https://huntr.dev/bounties/ef7f4cf7-3a81-4516-b261-f5b6ac21430cThird Party Advisory
- https://ledgersmb.org/cve-2021-3694-cross-site-scriptingVendor Advisory
- https://www.debian.org/security/2021/dsa-4962Third Party Advisory
- https://github.com/ledgersmb/ledgersmb/commit/98fa476d46a4a7e5e9492ed69b4fa190be5547fcPatch, Third Party Advisory
- https://huntr.dev/bounties/ef7f4cf7-3a81-4516-b261-f5b6ac21430cThird Party Advisory
- https://ledgersmb.org/cve-2021-3694-cross-site-scriptingVendor Advisory
- https://www.debian.org/security/2021/dsa-4962Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3694?
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.
How severe is CVE-2021-3694?
CVE-2021-3694 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 2.39% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3694?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-3694?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST