CVE-2026-15273 json
Automatic.css 4.0.0 - Unauthenticated Stored Cross-Site Scripting via REQUEST_URI
published 2026-09-26 44 d ago modified 2026-09-28 42 d ago also EUVD-2026-87526
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 12%
- public exploits
- 0
- none known
Summary
The Automatic.css plugin for WordPress is vulnerable to Stored Cross-Site Scripting via REQUEST_URI in all version 4.0.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute whenever an administrator accesses the Activity Log settings page.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 43 d ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- Automatic.css Automatic.css
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/07d697c5-1c15-4d3a-8637-cc4fd408f209?source=cve
- plugins.trac.wordpress.org /browser/automaticcss-plugin/trunk/classes/UI/Settings_Page/Activity_Log.php#L90
- plugins.trac.wordpress.org /browser/automaticcss-plugin/trunk/classes/Helpers/Logger.php#L187
- plugins.trac.wordpress.org /browser/automaticcss-plugin/trunk/classes/Plugin.php#L175
- plugins.trac.wordpress.org /browser/automaticcss-plugin/trunk/classes/Lib/WideEvents/Formatter/JsonFormatter.php#L25
- automaticcss.com /changelogs/
Sources
- CVE List CVE-2026-15273
- NVD CVE-2026-15273
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.