CVE-2023-40786: HKcms v2.3.0.230709 is vulnerable to Cross Site Scripting (XSS) allowing administrator cookies to be stolen.

Routine

MEDIUM 5.4DOWNGRADE

CVE-2023-40786 is a medium-severity flaw (CVSS 5.4) affecting hkcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

HKcms v2.3.0.230709 is vulnerable to Cross Site Scripting (XSS) allowing administrator cookies to be stolen.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-09-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: hkcms

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

Am I affected?

Timeline

2023-09-11 14:15 UTCPublished CVE record published
2026-06-17 06:19 UTCUpdated Record last modified

hkcms hkcms DOWNGRADE

Affected: 2.3.0.230709

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.0.230709

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.3.0.230709 (Debian / Ubuntu)

apt-cache madison hkcms sudo apt install hkcms=<VERSION_BEFORE_2.3.0.230709> sudo apt-mark hold hkcms

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list hkcms sudo dnf downgrade hkcms-<VERSION_BEFORE_2.3.0.230709> sudo dnf versionlock add hkcms

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-2023-40786?

hkcms: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-40786 being exploited?

CVE-2023-40786 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-2023-40786 affect?

CVE-2023-40786 affects hkcms. Severity is medium (CVSS 5.4). HKcms v2.3.0.230709 is vulnerable to Cross Site Scripting (XSS) allowing administrator cookies to be stolen.

How urgent is CVE-2023-40786?

Priority 31/100. Public exploit reference

Related CVEs

CVE-2025-5013 MEDIUM 4.3 DOWNGRADE A vulnerability, which was classified as problematic, was found in HkCms up to 2.3.2.240702
CVE-2025-25761 HIGH 7.2 DOWNGRADE HkCms v2.3.2.240702 was discovered to contain an arbitrary file write vulnerability in the component Appcenter
CVE-2024-52677 CRITICAL 9.8 UPGRADE HkCms <= v2.3.2.240702 is vulnerable to file upload in the getFileName method in /app/common/library/Upload.ph
CVE-2023-1482 MEDIUM 4.7 DOWNGRADE A vulnerability, which was classified as problematic, was found in HkCms 2.2.4.230206

References

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