CVE-2025-6235: In ExtremeControl before 25.5.12, a cross-site scripting (XSS) vulnerability was discovered in a login interfa

Q: How do I fix CVE-2025-6235?

extremecontrol: upgrade to 25.5.12. Exact commands for each OS are on this page.

Q: Is CVE-2025-6235 being exploited?

CVE-2025-6235 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-6235 affect?

CVE-2025-6235 affects extremecontrol. Severity is medium (CVSS 6.1). In ExtremeControl before 25.5.12, a cross-site scripting (XSS) vulnerability was discovered in a login interface of the affected application. The issue stems from improper handling of user-supplied input within HTML attributes, allowing an

Q: How urgent is CVE-2025-6235?

Priority 26/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2025-6235 is a medium-severity flaw (CVSS 6.1) affecting extremecontrol. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In ExtremeControl before 25.5.12, a cross-site scripting (XSS) vulnerability was discovered in a login interface of the affected application. The issue stems from improper handling of user-supplied input within HTML attributes, allowing an attacker to inject script code that may execute in a user's browser under specific interaction conditions. Successful exploitation could lead to exposure of user data or unauthorized actions within the browser

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

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 82%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-07-21
Last modified	2026-06-17

Publisher (CNA): ExtremeNetworks · Vendor: extremenetworks

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

Am I affected?

Timeline

2025-07-21 14:15 UTCPublished CVE record published
2026-06-17 10:01 UTCUpdated Record last modified

extremenetworks extremecontrol UPGRADE

Affected: < 25.5.12

Fixed in: 25.5.12

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 25.5.12 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade extremecontrol

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade extremecontrol

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2025-6235?

extremecontrol: upgrade to 25.5.12. Exact commands for each OS are on this page.

Is CVE-2025-6235 being exploited?

CVE-2025-6235 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-2025-6235 affect?

CVE-2025-6235 affects extremecontrol. Severity is medium (CVSS 6.1). In ExtremeControl before 25.5.12, a cross-site scripting (XSS) vulnerability was discovered in a login interface of the affected application. The issue stems from improper handling of user-supplied input within HTML attributes, allowing an

How urgent is CVE-2025-6235?

Priority 26/100. No elevated risk signals yet.

References

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