CVE-2021-48014: FineReport 9.0 Unauthenticated Path Traversal File Write via ReportServer

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-22 · updated 2026-10-23
Weakness: CWE-22

Description

FineReport 9.0 contains a path traversal vulnerability in the /WebReport/ReportServer design_save_svg operation that allows unauthenticated attackers to write arbitrary files via the filePath parameter. Attackers can send a POST request with directory traversal sequences in filePath and a __CONTENT__ payload to write a JSP webshell and achieve remote code execution. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-14.

Affected products

FanRuan FineReport: 9.0

References

https://github.com/NHPT/WebReportV9Exp/blob/main/WebReport_Exp.py
https://github.com/PeiQi0/PeiQi-WIKI-Book/blob/main/docs/wiki/oa/%E5%B8%86%E8%BD%AFOA/%E5%B8%86%E8%BD%AF%E6%8A%A5%E8%A1%A8%20V9%20design_save_svg%20%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E8%A6%86%E7%9B%96%E6%96%87%E4%BB%B6%E4%B8%8A%E4%BC%A0.md
https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/finereport/fine-report-v9-file-upload.yaml
https://www.fanruan.com/en/finereport
https://www.vulncheck.com/advisories/finereport-9.0-unauthenticated-path-traversal-file-write-via-reportserver

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