VikWidgetsLoader < 1.12.0 - Contributor+ Stored XSS via Gutenberg Block class_suffix
Priority LOW 32CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
The VikWidgetsLoader WordPress plugin before 1.12.0 does not sanitise or escape a block attribute before outputting it inside an inline script, allowing users with the Contributor role to store arbitrary JavaScript that executes in the browser of any user viewing the affected post, including the administrator who reviews the pending submission.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00431 37th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed VikWidgetsLoader (Unknown): 1.12.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
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 | VikWidgetsLoader | 1.11.0 to before 1.12.0 | 1.12.0 | Patch available | CNA |
- VikWidgetsLoader VendorUnknown Affected 1.11.0 to before 1.12.0 Fixed in 1.12.0 Patch available CNA
Remediation
- Fix · CNA VikWidgetsLoader (Unknown) Fixed in 1.12.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-84899
- 2026-10-03 Alias added: GHSA-gff8-vmj9-6526
References
Sources
- CVE-2026-84899 · CVE Program
- CVE-2026-84899 · NVD
- FIRST EPSS
- GHSA-gff8-vmj9-6526 · 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