CVE-2024-54123: Backdrop CMS before 1.28.4 and 1.29.x before 1.29.2 allows XSS via an SVG document, if the SVG tag is allowed

Routine

MEDIUM 6.1UPGRADE

CVE-2024-54123 is a medium-severity flaw (CVSS 6.1) affecting backdrop cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Backdrop CMS before 1.28.4 and 1.29.x before 1.29.2 allows XSS via an SVG document, if the SVG tag is allowed for a text format.

Why this priority

No elevated risk signals yet

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 78%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-11-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: backdropcms

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

Am I affected?

Timeline

2024-11-29 04:15 UTCPublished CVE record published
2026-06-17 08:09 UTCUpdated Record last modified

backdropcms backdrop cms UPGRADE

Affected: < 1.28.4 · >= 1.29.0 and < 1.29.2

Fixed in: 1.28.4, 1.29.2

Safe to downgrade to: a release before 1.29.0

1. Check installed version

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

2. UPGRADE to 1.28.4 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade backdrop-cms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.29.0 (Debian / Ubuntu)

apt-cache madison backdrop-cms sudo apt install backdrop-cms=<VERSION_BEFORE_1.29.0> sudo apt-mark hold backdrop-cms

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list backdrop-cms sudo dnf downgrade backdrop-cms-<VERSION_BEFORE_1.29.0> sudo dnf versionlock add backdrop-cms

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-2024-54123?

backdrop cms: upgrade to 1.28.4, 1.29.2. Exact commands for each OS are on this page.

Is CVE-2024-54123 being exploited?

CVE-2024-54123 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-2024-54123 affect?

CVE-2024-54123 affects backdrop cms. Severity is medium (CVSS 6.1). Backdrop CMS before 1.28.4 and 1.29.x before 1.29.2 allows XSS via an SVG document, if the SVG tag is allowed for a text format.

How urgent is CVE-2024-54123?

Priority 27/100. No elevated risk signals yet.

Related CVEs

CVE-2025-44141 MEDIUM 6.1 DOWNGRADE A Cross-Site Scripting (XSS) vulnerability exists in the node creation form of Backdrop CMS 1.30.
CVE-2025-63828 MEDIUM 6.1 DOWNGRADE Host Header Injection vulnerability in Backdrop CMS 1.32.1 allows attackers to manipulate the Host header in p
CVE-2025-25063 MEDIUM 4.4 UPGRADE An XSS issue was discovered in Backdrop CMS 1.28.x before 1.28.5 and 1.29.x before 1.29.3
CVE-2025-25062 MEDIUM 4.4 UPGRADE An XSS issue was discovered in Backdrop CMS 1.28.x before 1.28.5 and 1.29.x before 1.29.3

References

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