CVE-2024-49380

published 2024-10-25

CVE-2024-49380: Plenti, a static site generator, has an arbitrary file write vulnerability in versions prior to 0.7.2. The `/postLocal` endpoint is vulnerable to an arbitrary…

Priority P1 78 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C N I H A N

ITW EXPLOIT VulnCheck KEV

Plenti, a static site generator, has an arbitrary file write vulnerability in versions prior to 0.7.2. The `/postLocal` endpoint is vulnerable to an arbitrary file write vulnerability when a plenti user serves their website. This issue may lead to Remote Code Execution. Version 0.7.2 fixes the vulnerability.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
github.com	plentico_plenti	>= 0 < 0.7.2	0.7.2
plenti	plenti	< 0.7.2	0.7.2
plentico	plenti	< 0.7.2	0.7.2

Detection & IOCs extracted from sources · hover to see the quote

url /postlocal↗

path static/{{filename}}.txt

command POST /postlocal HTTP/1.1 Content-Type: application/json [{"Action": "create","Contents":"{{randstr}}","File": "static/{{filename}}.txt"}]

other shodan: title:"Plenti"

• → Monitor for POST requests to the /postlocal endpoint with a JSON body containing 'Action', 'Contents', and 'File' fields — this is the exploit path for arbitrary file write.
• → Detect file write attempts targeting paths under the 'static/' directory via the /postlocal endpoint, which can be used to stage web-accessible payloads for RCE.
• → Use Shodan query 'title:"Plenti"' to identify exposed Plenti instances that may be vulnerable.
• → Verify exploitation by checking if a newly written file is accessible via a subsequent GET request to the static path — a 200 response with matching content confirms arbitrary file write.

• · The vulnerability is unauthenticated — no credentials or prior access are required to exploit the /postlocal endpoint.
• · The vulnerability only exists when a Plenti user is actively serving their website (i.e., the local dev server is running and exposed). ↗
• · The Nuclei template is marked 'intrusive' — running it will actively write a file to the target server as part of verification.

CVSS provenance

nvd v3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

nvd v4.0 8.9 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

vulncheck 8.9 HIGH

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