4.4

CVE-2025-25062: backdropcms backdrop

Analyzed
Published 03-02-2025Last modified 09-05-2025

Vulnerability summary

CVE-2025-25062 is a medium (CVSS 4.4) vulnerability in backdropcms backdrop. EPSS estimates a 1.72% chance of exploitation in the next 30 days, higher than 77.5% of scored vulnerabilities. 2 public exploits are recorded.

Priority
Routine

Not severe (CVSS 4.4, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.72%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2reference

Timeline

  1. 03-02-2025
    PublishedVulnerability first disclosed.
  2. 09-05-2025
    Last modifiedVulnerability information updated.

Description

An XSS issue was discovered in Backdrop CMS 1.28.x before 1.28.5 and 1.29.x before 1.29.3. It doesn't sufficiently isolate long text content when the CKEditor 5 rich text editor is used. This allows a potential attacker to craft specialized HTML and JavaScript that may be executed when an administrator attempts to edit a piece of content. This vulnerability is mitigated by the fact that an attacker must have the ability to create long text content (such as through the node or comment forms) and an administrator must edit (not view) the content that contains the malicious content. This problem only exists when using the CKEditor 5 module.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.72%

Chance of exploitation in the next 30 days

Percentile

78%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.72% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found
  • referenceUnverified

    Exploit Reference (medium.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (getastra.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, user interaction (CVSS vector). Other conditions: not stated in public data.

Backdropcms2 products
  • backdrop≥ 1.28.0, < 1.28.5 | ≥ 1.29.0, < 1.29.3
  • backdrop_cms≥ 1.28.0, < 1.28.5 | ≥ 1.29.0, < 1.29.3

1 vendor · 2 products

References

3 links