CVE-2021-3694
Cross-site Scripting (XSS) - Reflected in ledgersmb/ledgersmb
CRITICAL
9.6
CVSS Score
Published: August 23, 2021 at 12:41 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
2 products affected across 2 vendorsDebian LinuxLedgersmb
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Severity
CRITICAL9.6
Exploit prediction
EPSS 3%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%v < 1.8.181.1.0 ≤ v ≤ 1.1.121.2.0 ≤ v ≤ 1.2.261.3.0 ≤ v ≤ 1.3.471.4.0 ≤ v ≤ 1.4.421.5.0 ≤ v ≤ 1.5.301.6.0 ≤ v ≤ 1.6.331.7.0 ≤ v ≤ 1.7.321.8.0 ≤ v ≤ 1.8.17
Vendor states this is fixed in 1.7.33 (unaffected)
Affected range stops below 1.8.18, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/ledgersmb/ledgersmb/commit/98fa476d46a4a7e5e9492ed69b4fa190be5547fcx_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://huntr.dev/bounties/ef7f4cf7-3a81-4516-b261-f5b6ac21430cx_refsource_MISCVendor Advisory
Source: [email protected]
https://ledgersmb.org/cve-2021-3694-cross-site-scriptingVendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2021/dsa-4962CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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