USM Premium < 16.3 - Admin+ Stored XSS
Priority MEDIUM 55Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
The USM-Premium WordPress plugin before 16.3 does not sanitize 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 0.00477 41st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed Ultimate-Premium-Plugin (Unknown): 16.3
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 | Ultimate-Premium-Plugin | before 16.3 | 16.3 | Patch available | CNA |
- Ultimate-Premium-Plugin VendorUnknown Affected before 16.3 Fixed in 16.3 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ultimatelysocial:usm_premium:*:*:*:*:*:wordpress:*:* | before 16.3 | Vulnerable | UltimatelySocial |
- cpe:2.3:a:ultimatelysocial:usm_premium:*:*:*:*:*:wordpress:*:* Versions before 16.3 Vulnerable ·UltimatelySocial
Remediation
- Fix · CNA Ultimate-Premium-Plugin (Unknown) Fixed in 16.3
Timeline
- 2026-10-02 Threatist record created from CVE-2023-1166
- 2026-10-03 Alias added: GHSA-chj2-8247-g69q
References
Sources
- CVE-2023-1166 · CVE Program
- CVE-2023-1166 · NVD
- FIRST EPSS
- GHSA-chj2-8247-g69q · 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