CVE-2023-34990Public exploitNetwork attack vector

Unauthenticated file read via relative path traversal

Published Dec 18, 2024 · Updated Dec 20, 2024

Relative path traversal in Fortinet FortiWLM 8.5.0 through 8.5.4 and 8.6.0 through 8.6.5 allows remote attackers to read sensitive files. The ezrf_lighttpd.cgi handler uses the imagename parameter from an upgradelogs request for file access without containing relative path segments. No authentication or user interaction is required, and successful requests can return local files such as the FortiWLM HTTP error log.

CVSS severity9.8
Critical
EPSS probability24.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Relative path traversal in Fortinet FortiWLM 8.5.0 through 8.5.4 and 8.6.0 through 8.6.5 allows remote attackers to read sensitive files. The ezrf_lighttpd.cgi handler uses the imagename parameter from an upgradelogs request for file access without containing relative path segments. No authentication or user interaction is required, and successful requests can return local files such as the FortiWLM HTTP error log.

The record

CVE
CVE-2023-34990
Published
Dec 18, 2024
Updated
Dec 20, 2024
Vendor
Fortinet
Product
FortiWLM
Classifications
CWE-23, CWE-94, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 20, 2024Record 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=8.5.0 <=8.5.4
  2. Affected versionversion=8.6.0 <=8.6.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiWLMversion=8.5.0 <=8.5.4; version=8.6.0 <=8.6.5

Published CVSS scores

9.6FortinetCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:X/RC:X
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-23Relative Path Traversal
CWE-94Improper Control of Generation of Code ('Code Injection')
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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