CVE-2023-34990: A relative path traversal in Fortinet FortiWLM version 8.6.0 through 8.6.5 and 8.5.0 through 8.5.4 allows atta

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CRITICAL 9.8REMOTEUPGRADE

CVE-2023-34990 is a critical-severity flaw (CVSS 9.8) affecting fortiwlm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A relative path traversal in Fortinet FortiWLM version 8.6.0 through 8.6.5 and 8.5.0 through 8.5.4 allows attacker to execute unauthorized code or commands via specially crafted web requests.

Why this priority

Critical severity
EPSS top 2%: very likely to be exploited
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	24.8% (top 2%)
CISA exploited list	No
Weakness	CWE-23, CWE-94
Published	2024-12-18
Last modified	2026-06-17

Publisher (CNA): Fortinet, Inc. · Vendor: fortinet

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-12-18 13:15 UTCPublished CVE record published
2026-06-17 06:04 UTCUpdated Record last modified

fortinet fortiwlm UPGRADE

Affected: >= 8.5.0 and < 8.5.5 · >= 8.6.0 and < 8.6.6

Fixed in: 8.5.5, 8.6.6

Safe to downgrade to: a release before 8.5.0

1. Check installed version

apt-cache policy fortiwlm || rpm -q fortiwlm || fortiwlm --version

2. UPGRADE to 8.5.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fortiwlm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fortiwlm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 8.5.0 (Debian / Ubuntu)

apt-cache madison fortiwlm sudo apt install fortiwlm=<VERSION_BEFORE_8.5.0> sudo apt-mark hold fortiwlm

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list fortiwlm sudo dnf downgrade fortiwlm-<VERSION_BEFORE_8.5.0> sudo dnf versionlock add fortiwlm

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · byobu · FIXED · 7.23-1.fc46 · FEDORA-2026-08f2b53446 · source

sudo dnf upgrade --advisory=FEDORA-2026-08f2b53446

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: FortiWLM - Directory Traversal

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-34990?

fortiwlm: upgrade to 8.5.5, 8.6.6. Exact commands for each OS are on this page.

Is CVE-2023-34990 being exploited?

CVE-2023-34990 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-34990 affect?

CVE-2023-34990 affects fortiwlm. Severity is critical (CVSS 9.8). A relative path traversal in Fortinet FortiWLM version 8.6.0 through 8.6.5 and 8.5.0 through 8.5.4 allows attacker to execute unauthorized code or commands via specially crafted web requests.

How urgent is CVE-2023-34990?

Priority 67/100. Critical severity; EPSS top 2%: very likely to be exploited; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

Fortinet vulnerabilities

References

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