CVE-2023-5566 json
Simple Shortcodes <= 1.0.20 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
published 2023-10-30 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-57865
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
The Simple Shortcodes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via shortcodes in versions up to, and including, 1.0.20 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 21 mo ago
Exploit prediction
0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/smpl-shortcodes/tags/1.0.20/includes/shortcodes.php#L386 referenced PoC, tagged "exploit" by a source, unverified
- plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/smpl-shortcodes/tags/1.0.20/includes/shortcodes.php#L292 referenced PoC, tagged "exploit" by a source, unverified
- plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/smpl-shortcodes/tags/1.0.20/includes/shortcodes.php#L257 referenced PoC, tagged "exploit" by a source, unverified
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 |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected products
- simplethemes Simple Shortcodes
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
plugins.trac.wordpress.org
/browser/smpl-shortcodes/tags/1.0.20/includes/shortcodes.php#L386
exploit
-
plugins.trac.wordpress.org
/browser/smpl-shortcodes/tags/1.0.20/includes/shortcodes.php#L292
exploit
-
plugins.trac.wordpress.org
/browser/smpl-shortcodes/tags/1.0.20/includes/shortcodes.php#L257
exploit
-
wordfence.com
/threat-intel/vulnerabilities/id/a153d6b2-e3fd-42db-90ba-d899a07d60c1?source=cve
third-party-advisory
Sources
- CVE List CVE-2023-5566
- NVD CVE-2023-5566
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.