What is CVE-2025-25063?

CVE-2025-25063 is a medium-severity vulnerability in Backdropcms Backdrop, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2025-02-03.

How severe is CVE-2025-25063?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Is CVE-2025-25063 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Backdropcms Backdrop

CVE-2025-25063

An XSS issue was discovered in Backdrop CMS 1.28.x before 1.28.5 and 1.29.x before 1.29.3. It does not sufficiently validate uploaded SVG images to ensure they do not contain potentially dangerous SVG tags. SVG images can contain clickable links and executable scripting, and using a crafted SVG, it is possible to execute scripting in the browser when an SVG image is viewed. This issue is mitigated by the attacker needing to be able to upload SVG images, and that Backdrop embeds all uploaded SVG images within <img> tags, which prevents scripting from executing. The SVG must be viewed directly by its URL in order to run any embedded scripting.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (10.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Backdropcms Backdrop — versions 1.28.0, 1.29.0
Backdropcms Backdrop_cms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

cve@mitre.org (Vendor Advisory)

Frequently asked questions

What is CVE-2025-25063?: CVE-2025-25063 is a medium-severity vulnerability in Backdropcms Backdrop, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2025-02-03.
How severe is CVE-2025-25063?: Medium severity. CVSS v3 base score is 4.4 out of 10.
Is CVE-2025-25063 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.