CVE-2023-30804Public exploitNetwork attack vector

Arbitrary file read via unconstrained loadfile path

Published Oct 10, 2023 · Updated Nov 28, 2025

Path traversal in Sangfor Next-Generation Application Firewall AF5.4 through AF8.0.17 allows remote authenticated users to read system files. The /svpn_html/loadfile.php endpoint passes the untrusted file parameter to file_exists() and readfile() without constraining its path. Authentication is normally required; chaining CVE-2023-30803 bypasses that gate, and exposed files can include live session identifiers.

CVSS severity6.5
Medium
EPSS probability12.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Sangfor Next-Generation Application Firewall AF5.4 through AF8.0.17 allows remote authenticated users to read system files. The /svpn_html/loadfile.php endpoint passes the untrusted file parameter to file_exists() and readfile() without constraining its path. Authentication is normally required; chaining CVE-2023-30803 bypasses that gate, and exposed files can include live session identifiers.

The record

CVE
CVE-2023-30804
Published
Oct 10, 2023
Updated
Nov 28, 2025
Vendor
Sangfor Technologies
Product
Next-Generation Application Firewall
Classifications
CWE-200, T1190, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.0.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sangfor Technologies · Next-Generation Application Firewallversion=8.0.17

Published CVSS scores

4.9VulnCheckCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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