CVE-2025-65203: KeePassXC-Browser thru 1.9.9.2 autofills or prompts to fill stored credentials into documents rendered under a

Q: How do I fix CVE-2025-65203?

keepassxc-browser: upgrade to newer than 1.9.9.2. Exact commands for each OS are on this page.

Q: Is CVE-2025-65203 being exploited?

CVE-2025-65203 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-2025-65203 affect?

CVE-2025-65203 affects keepassxc-browser. Severity is high (CVSS 7.1). KeePassXC-Browser thru 1.9.9.2 autofills or prompts to fill stored credentials into documents rendered under a browser-enforced CSP directive and iframe attribute sandbox, allowing attacker-controlled script in the sandboxed document to acc

Routine

HIGH 7.1UPGRADE

CVE-2025-65203 is a high-severity flaw (CVSS 7.1) affecting keepassxc-browser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

KeePassXC-Browser thru 1.9.9.2 autofills or prompts to fill stored credentials into documents rendered under a browser-enforced CSP directive and iframe attribute sandbox, allowing attacker-controlled script in the sandboxed document to access populated form fields and exfiltrate credentials.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-352, CWE-353, CWE-640
Published	2025-12-17
Last modified	2026-10-13

Publisher (CNA): MITRE · Vendor: keepassxc

Last updated 2026-10-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-17 18:15 UTCPublished CVE record published
2026-10-13 11:10 UTCUpdated Record last modified

keepassxc keepassxc-browser UPGRADE

Affected: <= 1.9.9.2

Fixed in: newer than 1.9.9.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy keepassxc-browser || rpm -q keepassxc-browser || keepassxc-browser --version

2. UPGRADE to newer than 1.9.9.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade keepassxc-browser

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade keepassxc-browser

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-2025-65203?

keepassxc-browser: upgrade to newer than 1.9.9.2. Exact commands for each OS are on this page.

Is CVE-2025-65203 being exploited?

CVE-2025-65203 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-2025-65203 affect?

CVE-2025-65203 affects keepassxc-browser. Severity is high (CVSS 7.1). KeePassXC-Browser thru 1.9.9.2 autofills or prompts to fill stored credentials into documents rendered under a browser-enforced CSP directive and iframe attribute sandbox, allowing attacker-controlled script in the sandboxed document to acc

How urgent is CVE-2025-65203?

Priority 26/100. High severity

References

← Back to latest CVEs