CVE-2023-35885: CloudPanel 2 before 2.3.1 has insecure file-manager cookie authentication.

Q: How do I fix CVE-2023-35885?

cloudpanel: upgrade to 2.3.1. Exact commands for each OS are on this page.

Q: Is CVE-2023-35885 being exploited?

CVE-2023-35885 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-35885 affect?

CVE-2023-35885 affects cloudpanel. Severity is critical (CVSS 9.8). CloudPanel 2 before 2.3.1 has insecure file-manager cookie authentication.

Q: How urgent is CVE-2023-35885?

Priority 72/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2023-35885 is a critical-severity flaw (CVSS 9.8) affecting cloudpanel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CloudPanel 2 before 2.3.1 has insecure file-manager cookie authentication.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference
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	73.5% (top 1%)
CISA exploited list	No
Weakness	CWE-565
Published	2023-06-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mgt-commerce

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

Am I affected?

Timeline

2023-06-20 20:15 UTCPublished CVE record published
2026-06-17 06:05 UTCUpdated Record last modified

mgt-commerce cloudpanel UPGRADE

Affected: >= 2.0.0 and < 2.3.1

Fixed in: 2.3.1

Safe to downgrade to: a release before 2.0.0

1. Check installed version

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

2. UPGRADE to 2.3.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cloudpanel

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 2.0.0 (Debian / Ubuntu)

apt-cache madison cloudpanel sudo apt install cloudpanel=<VERSION_BEFORE_2.0.0> sudo apt-mark hold cloudpanel

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

dnf --showduplicates list cloudpanel sudo dnf downgrade cloudpanel-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add cloudpanel

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 · borgmatic · FIXED · 2.2.0-1.fc46 · FEDORA-2026-041229e71b · source

sudo dnf upgrade --advisory=FEDORA-2026-041229e71b

Fedora ELN · pie · FIXED · 1.5.4-1.eln159 · FEDORA-2026-a2c0261d3a · source

sudo dnf upgrade --advisory=FEDORA-2026-a2c0261d3a

Public exploits and detection

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

GitHub PoC: datackmy/FallingSkies-CVE-2023-35885 (55 stars)
GitHub PoC: Chocapikk/CVE-2023-35885 (6 stars)
Write-up: www.cloudpanel.io/docs/v2/changelog/
Write-up: www.datack.my/fallingskies-cloudpanel-0-day/
Nuclei scan template: Cloudpanel 2 < 2.3.1 - Remote Code Execution

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-2023-35885?

cloudpanel: upgrade to 2.3.1. Exact commands for each OS are on this page.

Is CVE-2023-35885 being exploited?

CVE-2023-35885 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-2023-35885 affect?

CVE-2023-35885 affects cloudpanel. Severity is critical (CVSS 9.8). CloudPanel 2 before 2.3.1 has insecure file-manager cookie authentication.

How urgent is CVE-2023-35885?

Priority 72/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-24320 HIGH 8.8 UPGRADE Directory Traversal vulnerability in Mgt-commerce CloudPanel v.2.0.0 thru v.2.4.0 allows a remote attacker to
CVE-2023-46157 HIGH 8.8 UPGRADE File-Manager in MGT CloudPanel 2.0.0 through 2.3.2 allows the lowest privilege user to achieve OS command inje
CVE-2023-36630 HIGH 8.8 UPGRADE In CloudPanel before 2.3.1, insecure file upload leads to privilege escalation and authentication bypass.
CVE-2023-33747 HIGH 7.8 UPGRADE CloudPanel v2.2.2 allows attackers to execute a path traversal.

References

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