PatchTheCVECVE-2021-24309: The "Schedule Name" input in the Weekly Schedule WordPress plugin before 3.4.3 general options did not properl
CVE-2021-24309 is a medium-severity flaw (CVSS 5.4) affecting weekly schedule. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The "Schedule Name" input in the Weekly Schedule WordPress plugin before 3.4.3 general options did not properly sanitize input, allowing a user to inject javascript code using the <script> HTML tags and cause a stored XSS issue
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 | 0.7% (top 49%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2021-06-01 |
| 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-2021-24309?
weekly schedule: upgrade to 3.4.3. Exact commands for each OS are on this page.
Is CVE-2021-24309 being exploited?
CVE-2021-24309 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-2021-24309 affect?
CVE-2021-24309 affects weekly schedule. Severity is medium (CVSS 5.4). The "Schedule Name" input in the Weekly Schedule WordPress plugin before 3.4.3 general options did not properly sanitize input, allowing a user to inject javascript code using the <script> HTML tags and cause a stored XSS issue
How urgent is CVE-2021-24309?
Priority 37/100. Public exploit reference