CVE-2024-42699: Cross Site Scripting vulnerability in Create/Modify article function in Alkacon OpenCMS 17.0 allows remote att

This week

MEDIUM 6.5REMOTEDOWNGRADE

CVE-2024-42699 is a medium-severity flaw (CVSS 6.5) affecting opencms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting vulnerability in Create/Modify article function in Alkacon OpenCMS 17.0 allows remote attacker to inject javascript payload via image title sub-field in the image field

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-04-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: alkacon

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

Am I affected?

Timeline

2025-04-21 15:15 UTCPublished CVE record published
2026-06-17 07:49 UTCUpdated Record last modified

alkacon opencms DOWNGRADE

Affected: 17.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 17.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 17.0.0 (Debian / Ubuntu)

apt-cache madison opencms sudo apt install opencms=<VERSION_BEFORE_17.0.0> sudo apt-mark hold opencms

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

dnf --showduplicates list opencms sudo dnf downgrade opencms-<VERSION_BEFORE_17.0.0> sudo dnf versionlock add opencms

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-2024-42699?

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

Is CVE-2024-42699 being exploited?

CVE-2024-42699 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-2024-42699 affect?

CVE-2024-42699 affects opencms. Severity is medium (CVSS 6.5). Cross Site Scripting vulnerability in Create/Modify article function in Alkacon OpenCMS 17.0 allows remote attacker to inject javascript payload via image title sub-field in the image field

How urgent is CVE-2024-42699?

Priority 40/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-41446 MEDIUM 5.4 DOWNGRADE A stored cross-site scripting (XSS) vulnerability in Alkacon OpenCMS v17.0 allows attackers to execute arbitra
CVE-2025-3317 MEDIUM 4.3 MITIGATE A vulnerability classified as problematic has been found in fumiao opencms up to a0fafa5cff58719e9b27c2a2eec20
CVE-2025-28099 MEDIUM 4.3 DOWNGRADE opencms V2.3 is vulnerable to Arbitrary file read in src/main/webapp/view/admin/document/dataPage.jsp,
CVE-2025-0708 LOW 3.5 DOWNGRADE A vulnerability was found in fumiao opencms 2.2
CVE-2024-41447 MEDIUM 5.4 DOWNGRADE A stored cross-site scripting (XSS) vulnerability in Alkacon OpenCMS v17.0 allows attackers to execute arbitra

References

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