CVE-2025-25062

Exp

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.

Published: 2025-02-03 Last update: 2026-01-23 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-25062 is rated High Exploit Risk (71.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 36.86%, 97th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +8.45% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2025-25062

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2025-25062

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-24 28.41% 36.86% +8.45%
2 2026-04-18 24.64% 28.41% +3.77%
3 2026-04-08 — 24.64% —

Full EPSS history (37 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-25062

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.4 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 1.3 2.7 [email protected]

Weakness enumeration for CVE-2025-25062

Affected software / configurations for CVE-2025-25062

Vendor Product Version Raw CPE
backdropcms backdrop_cms >= 1.28.0, < 1.28.5 cpe:2.3:a:backdropcms:backdrop_cms:*:*:*:*:*:*:*:*
backdropcms backdrop_cms >= 1.29.0, < 1.29.3 cpe:2.3:a:backdropcms:backdrop_cms:*:*:*:*:*:*:*:*

References for CVE-2025-25062

cvelogic Threat Intelligence