CVE-2021-42645 json
CMSimple_XH 1.7.4 is affected by a remote code execution (RCE) vulnerability.
published 2022-05-10 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29609
- cvss
- 10.0
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.8%
- EPSS 4.8% chance of exploitation in 30 days, percentile 92%
- public exploits
- 0
- none known
Summary
CMSimple_XH 1.7.4 is affected by a remote code execution (RCE) vulnerability. To exploit this vulnerability, an attacker must use the "File" parameter to upload a PHP payload to get a reverse shell from the vulnerable host.
Patch / fix
Exploit prediction
4.83% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/Net-hunter121/CMSimple_XH-Unauth-RCE referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
github.com
/Net-hunter121/CMSimple_XH-Unauth-RCE
exploit, third-party-advisory
-
github.com
/cmsimple-xh/cmsimple-xh/releases/tag/1.7.5
release-notes, third-party-advisory
Sources
- CVE List CVE-2021-42645
- NVD CVE-2021-42645
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