CVE-2023-23913Network attack vector

Same-origin JavaScript execution via trusted pasted attributes

Published Jan 9, 2025 · Updated Jan 9, 2025

DOM XSS in Rails rails-ujs 5.1.0 through 6.1.7.2 and 7.0.0 through 7.0.4.2 allows attackers to run JavaScript via pasted HTML. Delegated method, remote, and disable handlers trust matching data attributes on pasted descendants of contenteditable elements instead of excluding editable content. A user must paste attacker-supplied HTML into a contenteditable element and then activate it, enabling script execution in the application's origin.

CVSS severity6.3
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

DOM XSS in Rails rails-ujs 5.1.0 through 6.1.7.2 and 7.0.0 through 7.0.4.2 allows attackers to run JavaScript via pasted HTML. Delegated method, remote, and disable handlers trust matching data attributes on pasted descendants of contenteditable elements instead of excluding editable content. A user must paste attacker-supplied HTML into a contenteditable element and then activate it, enabling script execution in the application's origin.

The record

CVE
CVE-2023-23913
Published
Jan 9, 2025
Updated
Jan 9, 2025
Vendor
Rails
Product
rails-ujs
Classifications
CWE-79, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.1.7.3 <6.1.7.3
  2. Affected versionversion=7.0.4.3 <7.0.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rails · rails-ujsversion=6.1.7.3 <6.1.7.3; version=7.0.4.3 <7.0.4.3

Published CVSS scores

6.3CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204User Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo