CVE-2025-63211: Stored cross-site scripting vulnerability in bridgetech VBC Server & Element Manager, firmware versions 6.5.0-

Routine

MEDIUM 6.1DOWNGRADE

CVE-2025-63211 is a medium-severity flaw (CVSS 6.1) affecting vbc server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stored cross-site scripting vulnerability in bridgetech VBC Server & Element Manager, firmware versions 6.5.0-9 thru 6.5.0-10, allows attackers to execute arbitrary code via the addName parameter to the /vbc/core/userSetupDoc/userSetupDoc endpoint.

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	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-11-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bridgetech

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

Am I affected?

Timeline

2025-11-19 19:15 UTCPublished CVE record published
2026-06-17 09:52 UTCUpdated Record last modified

bridgetech vbc server DOWNGRADE

Affected: 6.5.0-9 · 6.5.0-10

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.5.0-9

1. Check installed version

apt-cache policy vbc-server || rpm -q vbc-server || vbc-server --version

2. No fixed release: DOWNGRADE to a release before 6.5.0-9 (Debian / Ubuntu)

apt-cache madison vbc-server sudo apt install vbc-server=<VERSION_BEFORE_6.5.0-9> sudo apt-mark hold vbc-server

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

dnf --showduplicates list vbc-server sudo dnf downgrade vbc-server-<VERSION_BEFORE_6.5.0-9> sudo dnf versionlock add vbc-server

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-2025-63211?

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

Is CVE-2025-63211 being exploited?

CVE-2025-63211 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-2025-63211 affect?

CVE-2025-63211 affects vbc server. Severity is medium (CVSS 6.1). Stored cross-site scripting vulnerability in bridgetech VBC Server & Element Manager, firmware versions 6.5.0-9 thru 6.5.0-10, allows attackers to execute arbitrary code via the addName parameter to the /vbc/core/userSetupDoc/userSetupDoc e

How urgent is CVE-2025-63211?

Priority 32/100. Public exploit reference

Related CVEs

CVE-2025-63214 MEDIUM 6.5 DOWNGRADE An issue was discovered in bridgetech VBC Server & Element Manager, firmware version 6.5.0-10 , 6.5.0-9, allow

References

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