CVE-2021-27969: Dolphin CMS 7.4.2 is vulnerable to stored XSS via the Page Builder "width" parameter.

Routine

MEDIUM 4.8DOWNGRADE

CVE-2021-27969 is a medium-severity flaw (CVSS 4.8) affecting dolphin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dolphin CMS 7.4.2 is vulnerable to stored XSS via the Page Builder "width" parameter.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-03-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: boonex

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

Am I affected?

Timeline

2021-03-23 14:15 UTCPublished CVE record published
2026-06-17 03:45 UTCUpdated Record last modified

boonex dolphin DOWNGRADE

Affected: 7.4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.4.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 7.4.2 (Debian / Ubuntu)

apt-cache madison dolphin sudo apt install dolphin=<VERSION_BEFORE_7.4.2> sudo apt-mark hold dolphin

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

dnf --showduplicates list dolphin sudo dnf downgrade dolphin-<VERSION_BEFORE_7.4.2> sudo dnf versionlock add dolphin

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-2021-27969?

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

Is CVE-2021-27969 being exploited?

CVE-2021-27969 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-2021-27969 affect?

CVE-2021-27969 affects dolphin. Severity is medium (CVSS 4.8). Dolphin CMS 7.4.2 is vulnerable to stored XSS via the Page Builder "width" parameter.

How urgent is CVE-2021-27969?

Priority 35/100. Public exploit reference

Related CVEs

CVE-2017-17553 MEDIUM 5.3 DOWNGRADE The Dolphin Browser for Android 12.0.2 suffers from an insecure parsing implementation of the Intent URI schem
CVE-2017-17551 HIGH 8.8 DOWNGRADE The Backup and Restore feature in Mobotap Dolphin Browser for Android 12.0.2 suffers from an arbitrary file wr
CVE-2013-3638 HIGH 8.8 UPGRADE SQL injection vulnerability in Boonex Dolphin before 7.1.3 allows remote authenticated users to execute arbitr

References

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