Flattr <= 1.2.2 - Admin+ Stored XSS
Priority MEDIUM 50CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
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)
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Flattr | up to 1.2.2 | — | No fix listed | CNA |
- Flattr VendorUnknown Affected up to 1.2.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-3920
- 2026-10-03 Alias added: GHSA-jj5x-5vg3-9m7f
References
Sources
- CVE-2024-3920 · CVE Program
- CVE-2024-3920 · NVD
- FIRST EPSS
- GHSA-jj5x-5vg3-9m7f · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences