Flat Preloader < 1.5.5 - Admin+ Stored Cross-Site Scripting
Priority LOW 23CWE-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
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
The Flat Preloader WordPress plugin before 1.5.5 does not escape some of its settings when outputting them in attribute in the frontend, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html is disallowed
Why it matters now
EPSS 0.00643 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Flat Preloader (Unknown): 1.5.5
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Flat Preloader | 1.5.5 to before 1.5.5 | 1.5.5 | Patch available | CNA |
- Flat Preloader VendorUnknown Affected 1.5.5 to before 1.5.5 Fixed in 1.5.5 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:flat_preloader_project:flat_preloader:*:*:*:*:*:wordpress:*:* | before 1.5.5 | Vulnerable | Flat Preloader Project |
- cpe:2.3:a:flat_preloader_project:flat_preloader:*:*:*:*:*:wordpress:*:* Versions before 1.5.5 Vulnerable ·Flat Preloader Project
Remediation
- Fix · CNA Flat Preloader (Unknown) Fixed in 1.5.5
Timeline
- 2026-10-02 Threatist record created from CVE-2021-24789
- 2026-10-03 Alias added: GHSA-grw5-p86m-w8x6
- 2026-10-21 EPSS moved to the 50th–90th percentile
References
More Flat Preloader Project Flat Preloader vulnerabilities
- TI-2021-06967 Flat Preloader < 1.5.4 - CSRF to Stored Cross-Site Scripting CVSS 3.1MEDIUM 5.4
Sources
- CVE-2021-24789 · CVE Program
- CVE-2021-24789 · NVD
- FIRST EPSS
- GHSA-grw5-p86m-w8x6 · 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