CVE-2023-53909: WBCE CMS 1.6.1 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inj

Routine

MEDIUM 5.4DOWNGRADE

CVE-2023-53909 is a medium-severity flaw (CVSS 5.4) affecting wbce cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WBCE CMS 1.6.1 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious JavaScript by uploading crafted SVG files through the media manager. Attackers can upload SVG files containing script tags to the /wbce/modules/elfinder/ef/php/connector.wbce.php endpoint and execute JavaScript when victims access the uploaded file.

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 75%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-12-17
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: wbce

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

Am I affected?

Timeline

2025-12-17 23:15 UTCPublished CVE record published
2026-06-17 06:46 UTCUpdated Record last modified

wbce wbce cms DOWNGRADE

Affected: 1.6.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6.1

1. Check installed version

apt-cache policy wbce-cms || rpm -q wbce-cms || wbce-cms --version

2. No fixed release: DOWNGRADE to a release before 1.6.1 (Debian / Ubuntu)

apt-cache madison wbce-cms sudo apt install wbce-cms=<VERSION_BEFORE_1.6.1> sudo apt-mark hold wbce-cms

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

dnf --showduplicates list wbce-cms sudo dnf downgrade wbce-cms-<VERSION_BEFORE_1.6.1> sudo dnf versionlock add wbce-cms

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-2023-53909?

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

Is CVE-2023-53909 being exploited?

CVE-2023-53909 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-2023-53909 affect?

CVE-2023-53909 affects wbce cms. Severity is medium (CVSS 5.4). WBCE CMS 1.6.1 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious JavaScript by uploading crafted SVG files through the media manager. Attackers can upload SVG files containing scrip

How urgent is CVE-2023-53909?

Priority 30/100. Public exploit reference

Software pages

PHP vulnerabilities

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References

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