CVE-2026-0555Premmerce <= 1.3.20 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'premmerce_wizard_actions' AJAX Endpoint
- 6.4MediumCVSS base score
- 0.27%Exploitation in 30 daysEPSS · top 80% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The Premmerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'premmerce_wizard_actions' AJAX endpoint in all versions up to, and including, 1.3.20. This is due to missing capability checks and insufficient input sanitization and output escaping on the `state` parameter. This makes it possible for authenticated attackers, with subscriber level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page (the Premmerce Wizard admin page).
Timeline
ID reserved
By Wordfence
- 37 days later
· 37 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.27% · top 80% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.4.
Affected products
References
References6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/90b2a644-19a0-43a1-8ff6-7486d7ef29b3?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/premmerce/tags/1.3.20/src/Admin/Admin.php?marks=41#L41 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/premmerce/tags/1.3.20/src/Admin/Handlers/WizardHandler.php?marks=42,50,52#L42 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/premmerce/tags/1.3.20/src/Api/WizardApi.php?marks=38#L38 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/premmerce/tags/1.3.20/views/admin/tabs/wizard.php?marks=30#L30 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3464825/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-5740 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-0555)Record last updated .