CVE-2024-33507: An insufficient session expiration vulnerability [CWE-613] and an incorrect authorization vulnerability [CWE-8

Routine

HIGH 7.4REMOTEUPGRADE

CVE-2024-33507 is a high-severity flaw (CVSS 7.4) affecting fortiisolator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An insufficient session expiration vulnerability [CWE-613] and an incorrect authorization vulnerability [CWE-863] in FortiIsolator 2.4.0 through 2.4.4, 2.3 all versions, 2.2.0, 2.1 all versions, 2.0 all versions authentication mechanism may allow remote unauthenticated attacker to deauthenticate logged in admins via crafted cookie and remote authenticated read-only attacker to gain write privilege via crafted cookie.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-613
Published	2025-10-14
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

2025-10-14 16:15 UTCPublished CVE record published
2026-06-17 07:31 UTCUpdated Record last modified

fortinet fortiisolator UPGRADE

Affected: >= 2.3.0 and < 2.4.5

Fixed in: 2.4.5

Safe to downgrade to: a release before 2.3.0

1. Check installed version

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

2. UPGRADE to 2.4.5 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fortiisolator

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 2.3.0 (Debian / Ubuntu)

apt-cache madison fortiisolator sudo apt install fortiisolator=<VERSION_BEFORE_2.3.0> sudo apt-mark hold fortiisolator

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

dnf --showduplicates list fortiisolator sudo dnf downgrade fortiisolator-<VERSION_BEFORE_2.3.0> sudo dnf versionlock add fortiisolator

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.

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-2024-33507?

fortiisolator: upgrade to 2.4.5. Exact commands for each OS are on this page.

Is CVE-2024-33507 being exploited?

CVE-2024-33507 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-2024-33507 affect?

CVE-2024-33507 affects fortiisolator. Severity is high (CVSS 7.4). An insufficient session expiration vulnerability [CWE-613] and an incorrect authorization vulnerability [CWE-863] in FortiIsolator 2.4.0 through 2.4.4, 2.3 all versions, 2.2.0, 2.1 all versions, 2.0 all versions authentication mechanism may

How urgent is CVE-2024-33507?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Software pages

Fortinet vulnerabilities

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References

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