CVE-2021-3731

5.9 MEDIUM 1% exploit odds Fix listed

What it is

LedgerSMB does not sufficiently guard against being wrapped by other sites, making it vulnerable to 'clickjacking'. This allows an attacker to trick a targetted user to execute unintended actions.

At a glance

Exploitability: Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure.
Exploit odds: 1.2% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2021-08-23 13:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 04:05 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.2% in the next 30 days (EPSS).
Severity: 5.9 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2021-08-23 13:15 UTC
Last modified: 2026-06-17 04:05 UTC
Exploit probability: 1.2% · EPSS, next 30 days
Weakness: CWE-1021
Record status: Modified

Affected

Ledgersmb ≤ 1.1.12
Ledgersmb ≤ 1.2.26
Ledgersmb ≤ 1.3.47
Ledgersmb ≤ 1.4.42
Ledgersmb ≤ 1.5.30
Ledgersmb ≤ 1.6.33
Ledgersmb ≤ 1.7.32
Ledgersmb ≤ 1.8.17

Attack profile CVSS 3.1 · 5.9

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: Low
Availability: None

Raw vector

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

Is it in your code?

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Read https://cve-list.com/agent/cve/CVE-2021-3731.md and follow it. Check whether this project is affected by CVE-2021-3731. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record