CVE-2021-27524: Cross Site Scripting (XSS) vulnerability in margox braft-editor version 2.3.8, allows remote attackers to exec

Routine

MEDIUM 6.1DOWNGRADE

CVE-2021-27524 is a medium-severity flaw (CVSS 6.1) affecting braft-editor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerability in margox braft-editor version 2.3.8, allows remote attackers to execute arbitrary code via the embed media feature.

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	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-08-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: margox

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

Am I affected?

Timeline

2023-08-11 14:15 UTCPublished CVE record published
2026-06-17 03:45 UTCUpdated Record last modified

margox braft-editor DOWNGRADE

Affected: 2.3.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.8

1. Check installed version

apt-cache policy braft-editor || rpm -q braft-editor || braft-editor --version

2. No fixed release: DOWNGRADE to a release before 2.3.8 (Debian / Ubuntu)

apt-cache madison braft-editor sudo apt install braft-editor=<VERSION_BEFORE_2.3.8> sudo apt-mark hold braft-editor

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

dnf --showduplicates list braft-editor sudo dnf downgrade braft-editor-<VERSION_BEFORE_2.3.8> sudo dnf versionlock add braft-editor

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-2021-27524?

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

Is CVE-2021-27524 being exploited?

CVE-2021-27524 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-2021-27524 affect?

CVE-2021-27524 affects braft-editor. Severity is medium (CVSS 6.1). Cross Site Scripting (XSS) vulnerability in margox braft-editor version 2.3.8, allows remote attackers to execute arbitrary code via the embed media feature.

How urgent is CVE-2021-27524?

Priority 38/100. Public exploit reference

References

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