CVE-2021-24977 json
Use Any Font < 6.2.1 - Unauthenticated Arbitrary CSS Appending
published 2022-02-28 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11889
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 74%
- public exploits
- 0
- none known
Summary
The Use Any Font | Custom Font Uploader WordPress plugin before 6.2.1 does not have any authorisation checks when assigning a font, allowing unauthenticated users to sent arbitrary CSS which will then be processed by the frontend for all users. Due to the lack of sanitisation and escaping in the backend, it could also lead to Stored XSS issues
Patch / fix
- dineshkarki use_any_font 6.2.1
Exploit prediction
1.49% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/739831e3-cdfb-4a22-9abf-6c594d7e3d75 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
Affected products
- Unknown Use Any Font | Custom Font Uploader
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
-
wpscan.com
/vulnerability/739831e3-cdfb-4a22-9abf-6c594d7e3d75
exploit, third-party-advisory
Sources
- CVE List CVE-2021-24977
- NVD CVE-2021-24977
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