PatchTheCVECVE-2021-24782: The Flex Local Fonts WordPress plugin through 1.0.0 does not escape the Class Name field when adding a font, w
CVE-2021-24782 is a medium-severity flaw (CVSS 4.8) affecting flex local fonts. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The Flex Local Fonts WordPress plugin through 1.0.0 does not escape the Class Name field when adding a font, which could allow hight privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.8 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | High |
| User interaction | Required |
| EPSS exploit chance | 0.6% (top 50%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2021-12-13 |
| 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-2021-24782?
flex local fonts: upgrade to newer than 1.0.0. Exact commands for each OS are on this page.
Is CVE-2021-24782 being exploited?
CVE-2021-24782 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-2021-24782 affect?
CVE-2021-24782 affects flex local fonts. Severity is medium (CVSS 4.8). The Flex Local Fonts WordPress plugin through 1.0.0 does not escape the Class Name field when adding a font, which could allow hight privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallo
How urgent is CVE-2021-24782?
Priority 34/100. Public exploit reference