CVE-2023-1166 json
USM Premium < 16.3 - Admin+ Stored XSS
published 2023-06-27 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-23448
- cvss
- 4.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 41%
- public exploits
- 0
- none known
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).
Patch / fix
- Unknown Ultimate-Premium-Plugin 16.3
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 23 mo ago
Exploit prediction
0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/825eccf9-f351-4a5b-b238-9969141b94fa referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
Affected products
- Unknown Ultimate-Premium-Plugin
Classification
- Technology feeds
References
-
wpscan.com
/vulnerability/825eccf9-f351-4a5b-b238-9969141b94fa
exploit, vdb-entry, technical-description, third-party-advisory
Sources
- CVE List CVE-2023-1166
- NVD CVE-2023-1166
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.