CVE-2022-25224: Proton v0.2.0 allows an attacker to create a malicious link inside a markdown file

Routine

MEDIUM 5.4DOWNGRADE

CVE-2022-25224 is a medium-severity flaw (CVSS 5.4) affecting proton. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Proton v0.2.0 allows an attacker to create a malicious link inside a markdown file. When the victim clicks the link, the application opens the site in the current frame allowing an attacker to host JavaScript code in the malicious link in order to trigger an XSS attack. The 'nodeIntegration' configuration is set to on which allows the 'webpage' to use 'NodeJs' features, an attacker can leverage this to run OS commands.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-79
Published	2022-05-20
Last modified	2026-06-17

Publisher (CNA): Fluid Attacks · Vendor: proton project

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

Am I affected?

Timeline

2022-05-20 12:15 UTCPublished CVE record published
2026-06-17 04:33 UTCUpdated Record last modified

proton project proton DOWNGRADE

Affected: 0.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.2.0 (Debian / Ubuntu)

apt-cache madison proton sudo apt install proton=<VERSION_BEFORE_0.2.0> sudo apt-mark hold proton

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

dnf --showduplicates list proton sudo dnf downgrade proton-<VERSION_BEFORE_0.2.0> sudo dnf versionlock add proton

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-2022-25224?

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

Is CVE-2022-25224 being exploited?

CVE-2022-25224 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-2022-25224 affect?

CVE-2022-25224 affects proton. Severity is medium (CVSS 5.4). Proton v0.2.0 allows an attacker to create a malicious link inside a markdown file. When the victim clicks the link, the application opens the site in the current frame allowing an attacker to host JavaScript code in the malicious link in o

How urgent is CVE-2022-25224?

Priority 36/100. Public exploit reference

Software pages

Node.js vulnerabilities

References

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