PatchTheCVECVE-2023-0491: The Schedulicity WordPress plugin through 2.21 does not validate and escape some of its shortcode attributes b
CVE-2023-0491 is a medium-severity flaw (CVSS 5.4) affecting schedulicity. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The Schedulicity WordPress plugin through 2.21 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.4 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | Required |
| EPSS exploit chance | 0.6% (top 53%) |
| CISA exploited list | No |
| Published | 2023-03-27 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2023-0491?
schedulicity: upgrade to newer than 2.2.1. Exact commands for each OS are on this page.
Is CVE-2023-0491 being exploited?
CVE-2023-0491 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2023-0491 affect?
CVE-2023-0491 affects schedulicity. Severity is medium (CVSS 5.4). The Schedulicity WordPress plugin through 2.21 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and abov
How urgent is CVE-2023-0491?
Priority 36/100. Public exploit reference