XSS in Flattr

CVE-2024-3920

The Flattr WordPress plugin through 1.2.2 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (29.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N.

Affected products

  • Flattr
  • Unknown Flattr — versions 0

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • contact@wpscan.com (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2024-3920?
CVE-2024-3920 is a low-severity vulnerability in Flattr, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2024-05-23.
How severe is CVE-2024-3920?
Low severity. CVSS v3 base score is 3.5 out of 10.
Is CVE-2024-3920 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.