CVE-2021-47735
highpriority · track · 0EPSS 0.009 · 59 %ileEUUSEPSS · scored 2026-10-27
CMSimple 5.4 contains an authenticated remote code execution vulnerability that allows logged-in attackers to inject malicious PHP code into template files. Attackers can exploit the template editing functionality by crafting a reverse shell payload and saving it through the template editing endpoint with a valid CSRF token.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–8.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- https://www.cmsimple.org/cnnvd
- https://www.exploit-db.com/exploits/50356cnnvd
- https://www.vulncheck.com/advisories/cmsimple-authenticated-remote-code-execution-via-template-editingcnnvd
- https://www.cmsimple.org/enisa_euvd
- https://www.exploit-db.com/exploits/50356enisa_euvd
- https://www.vulncheck.com/advisories/cmsimple-authenticated-remote-code-execution-via-template-editingenisa_euvd
- https://www.cmsimple.org/Productnvd
- https://www.exploit-db.com/exploits/50356Exploitnvd
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