CVE-2021-47735

Description

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 v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-94 CWE-94

Affected Products

Vendor	Product	Versions
cmsimple	cmsimple	All

References

Exploits

https://www.exploit-db.com/exploits/50356

Other References

https://www.cmsimple.org/ https://www.vulncheck.com/advisories/cmsimple-authenticated-remote-code-execution-via-template-editing

Frequently Asked Questions

What is CVE-2021-47735? +

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. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2021-47735? +

CVE-2021-47735 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2021-47735? +

CVE-2021-47735 affects products from cmsimple, specifically: cmsimple. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2021-47735? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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