CVE-2025-63498: alinto SOGo 5.12.3 is vulnerable to Cross Site Scripting (XSS) via the "userName" parameter.

Routine

MEDIUM 6.1WATCHLISTDOWNGRADEMITIGATE

CVE-2025-63498 is a medium-severity flaw (CVSS 6.1) affecting sogo, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

alinto SOGo 5.12.3 is vulnerable to Cross Site Scripting (XSS) via the "userName" parameter.

Why this priority

Public exploit reference
On your watchlist

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 77%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-11-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: alinto · debian

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

Am I affected?

Timeline

2025-11-24 21:16 UTCPublished CVE record published
2026-06-17 09:53 UTCUpdated Record last modified

alinto sogo DOWNGRADE

Affected: 5.12.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.12.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.12.3 (Debian / Ubuntu)

apt-cache madison sogo sudo apt install sogo=<VERSION_BEFORE_5.12.3> sudo apt-mark hold sogo

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

dnf --showduplicates list sogo sudo dnf downgrade sogo-<VERSION_BEFORE_5.12.3> sudo dnf versionlock add sogo

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.

debian debian linux MITIGATE

Affected: 11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2025-63498?

sogo: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-63498 being exploited?

CVE-2025-63498 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-2025-63498 affect?

CVE-2025-63498 affects sogo, debian linux. Severity is medium (CVSS 6.1). alinto SOGo 5.12.3 is vulnerable to Cross Site Scripting (XSS) via the "userName" parameter.

How urgent is CVE-2025-63498?

Priority 37/100. Public exploit reference; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2025-63499 MEDIUM 6.1 UPGRADE Alinto Sogo 5.12.3 is vulnerable to Cross Site Scripting (XSS) via the theme parameter.
CVE-2026-3054 MEDIUM 4.3 DOWNGRADE A vulnerability was identified in Alinto SOGo 5.12.3/5.12.4
CVE-2026-33550 LOW 2.0 UPGRADE SOGo before 5.12.5 does not renew the OTP if a user disables/enables it, and has a too short length (only 12 d
CVE-2025-71276 MEDIUM 6.4 UPGRADE SOGo before 5.12.5 is prone to a XSS vulnerability with events, tasks, and contacts categories.
CVE-2024-34462 MEDIUM 6.1 UPGRADE Alinto SOGo through 5.10.0 allows XSS during attachment preview.

References

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