CVE-2023-27739: easyXDM 2.5 allows XSS via the xdm_e parameter.

Routine

MEDIUM 6.1DOWNGRADE

CVE-2023-27739 is a medium-severity flaw (CVSS 6.1) affecting easyxdm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

easyXDM 2.5 allows XSS via the xdm_e parameter.

Why this priority

No elevated risk signals yet

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	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-01-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: easyxdm

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

Am I affected?

Timeline

2024-01-08 21:15 UTCPublished CVE record published
2026-06-17 05:45 UTCUpdated Record last modified

easyxdm easyxdm DOWNGRADE

Affected: 2.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.5 (Debian / Ubuntu)

apt-cache madison easyxdm sudo apt install easyxdm=<VERSION_BEFORE_2.5> sudo apt-mark hold easyxdm

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

dnf --showduplicates list easyxdm sudo dnf downgrade easyxdm-<VERSION_BEFORE_2.5> sudo dnf versionlock add easyxdm

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-2023-27739?

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

Is CVE-2023-27739 being exploited?

CVE-2023-27739 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-2023-27739 affect?

CVE-2023-27739 affects easyxdm. Severity is medium (CVSS 6.1). easyXDM 2.5 allows XSS via the xdm_e parameter.

How urgent is CVE-2023-27739?

Priority 27/100. No elevated risk signals yet.

References

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