CVE-2023-40809: OpenCRX version 5.2.0 is vulnerable to HTML injection via the Activity Search Criteria-Activity Number.

Routine

MEDIUM 6.1DOWNGRADE

CVE-2023-40809 is a medium-severity flaw (CVSS 6.1) affecting opencrx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenCRX version 5.2.0 is vulnerable to HTML injection via the Activity Search Criteria-Activity Number.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-79, CWE-94
Published	2023-11-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: opencrx

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

Am I affected?

Timeline

2023-11-18 04:15 UTCPublished CVE record published
2026-06-17 06:19 UTCUpdated Record last modified

opencrx opencrx DOWNGRADE

Affected: 5.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.2.0 (Debian / Ubuntu)

apt-cache madison opencrx sudo apt install opencrx=<VERSION_BEFORE_5.2.0> sudo apt-mark hold opencrx

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

dnf --showduplicates list opencrx sudo dnf downgrade opencrx-<VERSION_BEFORE_5.2.0> sudo dnf versionlock add opencrx

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-2023-40809?

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

Is CVE-2023-40809 being exploited?

CVE-2023-40809 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-2023-40809 affect?

CVE-2023-40809 affects opencrx. Severity is medium (CVSS 6.1). OpenCRX version 5.2.0 is vulnerable to HTML injection via the Activity Search Criteria-Activity Number.

How urgent is CVE-2023-40809?

Priority 36/100. Public exploit reference

Related CVEs

CVE-2023-46502 CRITICAL 9.8 DOWNGRADE An issue in openCRX v.5.2.2 allows a remote attacker to read internal files and execute server side request fo
CVE-2023-40817 MEDIUM 6.1 DOWNGRADE OpenCRX version 5.2.0 is vulnerable to HTML injection via the Product Configuration Name Field.
CVE-2023-40816 MEDIUM 6.1 DOWNGRADE OpenCRX version 5.2.0 is vulnerable to HTML injection via Activity Milestone Name Field.
CVE-2023-40815 MEDIUM 6.1 DOWNGRADE OpenCRX version 5.2.0 is vulnerable to HTML injection via the Category Creation Name Field.
CVE-2023-40814 MEDIUM 6.1 DOWNGRADE OpenCRX version 5.2.0 is vulnerable to HTML injection via the Accounts Name Field.

References

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