CVE-2021-24253 json
Classyfrieds <= 3.8 - Authenticated Arbitrary File Upload to RCE
published 2021-05-05 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11167
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.9%
- EPSS 1.9% chance of exploitation in 30 days, percentile 79%
- public exploits
- 0
- none known
Summary
The Classyfrieds WordPress plugin through 3.8 does not properly check the uploaded file when an authenticated user adds a listing, only checking the content-type in the request. This allows any authenticated user to upload arbitrary PHP files via the Add Listing feature of the plugin, leading to RCE.
Exploit prediction
1.91% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/ee42c233-0ff6-4b27-a5ec-ad3246bef079 referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/jinhuang1102/CVE-ID-Reports/blob/master/classyfrieds.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Affected products
- Unknown Classyfrieds
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
- Technology feeds
References
-
wpscan.com
/vulnerability/ee42c233-0ff6-4b27-a5ec-ad3246bef079
exploit, third-party-advisory
-
github.com
/jinhuang1102/CVE-ID-Reports/blob/master/classyfrieds.md
exploit, third-party-advisory
Sources
- CVE List CVE-2021-24253
- NVD CVE-2021-24253
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