CVE-2025-57520: A Cross Site Scripting (XSS) vulnerability exists in Decap CMS thru 3.8.3

Q: How do I fix CVE-2025-57520?

decap cms: upgrade to newer than 3.8.3. Exact commands for each OS are on this page.

Q: Is CVE-2025-57520 being exploited?

CVE-2025-57520 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-2025-57520 affect?

CVE-2025-57520 affects decap cms. Severity is medium (CVSS 6.1). A Cross Site Scripting (XSS) vulnerability exists in Decap CMS thru 3.8.3. Input fields such as body, tags, title, and description are not properly sanitized before being rendered in the content preview pane. This enables an attacker to inj

Q: How urgent is CVE-2025-57520?

Priority 33/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2025-57520 is a medium-severity flaw (CVSS 6.1) affecting decap cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Cross Site Scripting (XSS) vulnerability exists in Decap CMS thru 3.8.3. Input fields such as body, tags, title, and description are not properly sanitized before being rendered in the content preview pane. This enables an attacker to inject arbitrary JavaScript which executes whenever a user views the preview panel. The vulnerability affects multiple input vectors and does not require user interaction beyond viewing the affected content.

Why this priority

Public exploit reference

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 73%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-09-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: techhub.p-m

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

Am I affected?

Timeline

2025-09-10 17:15 UTCPublished CVE record published
2026-06-17 09:43 UTCUpdated Record last modified

techhub.p-m decap cms UPGRADE

Affected: <= 3.8.3

Fixed in: newer than 3.8.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy decap-cms || rpm -q decap-cms || decap-cms --version

2. UPGRADE to newer than 3.8.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade decap-cms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade decap-cms

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-2025-57520?

decap cms: upgrade to newer than 3.8.3. Exact commands for each OS are on this page.

Is CVE-2025-57520 being exploited?

CVE-2025-57520 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-2025-57520 affect?

CVE-2025-57520 affects decap cms. Severity is medium (CVSS 6.1). A Cross Site Scripting (XSS) vulnerability exists in Decap CMS thru 3.8.3. Input fields such as body, tags, title, and description are not properly sanitized before being rendered in the content preview pane. This enables an attacker to inj

How urgent is CVE-2025-57520?

Priority 33/100. Public exploit reference

References

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