CVE-2020-13669Public exploitNetwork attack vector

Script injection via CKEditor image captions

Published Feb 11, 2022 · Updated Aug 4, 2024

Cross-site scripting in Drupal core before 8.8.10, 8.9.6, and 9.0.6 allows remote attackers to inject script through CKEditor image captions. The caption handler renders HTML-encoded script supplied in an image's data-caption attribute as active browser markup. Exploitation requires victim interaction with the crafted editor content, after which the script runs in the site's origin and can access or alter browser-session data.

CVSS severity6.1
Medium
EPSS probability0.64%
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

Cross-site scripting in Drupal core before 8.8.10, 8.9.6, and 9.0.6 allows remote attackers to inject script through CKEditor image captions. The caption handler renders HTML-encoded script supplied in an image's data-caption attribute as active browser markup. Exploitation requires victim interaction with the crafted editor content, after which the script runs in the site's origin and can access or alter browser-session data.

The record

CVE
CVE-2020-13669
Published
Feb 11, 2022
Updated
Aug 4, 2024
Vendor
OAuth.js
Product
Drupal core
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=8.8.x <8.8.10
  2. Affected versionversion=8.9.x <8.9.6
  3. Affected versionversion=9.0.x <9.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OAuth.js · Drupal coreversion=8.8.x <8.8.10; version=8.9.x <8.9.6; version=9.0.x <9.0.6

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

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