CVE-2025-63418: A DOM-based Cross-Site Scripting (XSS) vulnerability in the SelfBest platform 2023.3 allows attackers to execu

Routine

MEDIUM 6.1DOWNGRADE

CVE-2025-63418 is a medium-severity flaw (CVSS 6.1) affecting selfbest. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A DOM-based Cross-Site Scripting (XSS) vulnerability in the SelfBest platform 2023.3 allows attackers to execute arbitrary JavaScript in the context of a logged-in user's session by injecting payloads via the browser's developer console. The vulnerability arises from the application's client-side code being susceptible to direct DOM manipulation without adequate sanitization or a Content Security Policy (CSP), potentially leading to account takeo

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	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-11-05
Last modified	2026-10-27

Publisher (CNA): MITRE · Vendor: selfbest

Last updated 2026-10-27 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-05 19:16 UTCPublished CVE record published
2026-10-27 12:10 UTCUpdated Record last modified

selfbest selfbest DOWNGRADE

Affected: 2023.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2023.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2023.3 (Debian / Ubuntu)

apt-cache madison selfbest sudo apt install selfbest=<VERSION_BEFORE_2023.3> sudo apt-mark hold selfbest

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

dnf --showduplicates list selfbest sudo dnf downgrade selfbest-<VERSION_BEFORE_2023.3> sudo dnf versionlock add selfbest

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-2025-63418?

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

Is CVE-2025-63418 being exploited?

CVE-2025-63418 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-2025-63418 affect?

CVE-2025-63418 affects selfbest. Severity is medium (CVSS 6.1). A DOM-based Cross-Site Scripting (XSS) vulnerability in the SelfBest platform 2023.3 allows attackers to execute arbitrary JavaScript in the context of a logged-in user's session by injecting payloads via the browser's developer console. Th

How urgent is CVE-2025-63418?

Priority 30/100. Public exploit reference

Related CVEs

CVE-2025-63417 HIGH 7.2 DOWNGRADE A Stored Cross-Site Scripting (XSS) vulnerability in the chat functionality of the SelfBest platform 2023.3 al

References

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