CVE-2024-28593 json
Cross-site Scripting in Moodle Chat
published 2024-03-22 2 y ago modified 2026-09-10 1 mo ago also BIT-moodle-2024-28593 , EUVD-2024-0912 , GHSA-f6mh-79vh-2hv7
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
The Chat activity in Moodle 4.3.3 allows students to insert a potentially unwanted HTML A element or IMG element, or HTML content that leads to a performance degradation. NOTE: the vendor's Using_Chat page says "If you know some HTML code, you can use it in your text to do things like insert images, play sounds or create different coloured and sized text." This page also says "Chat is due to be removed from standard Moodle."
Patch / fix
- bitnami moodle 4.3.4
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | moodle/moodle | <=4.3.3 |
no fix listed |
| bitnami | moodle | >=4.3.3, <4.3.4 |
4.3.4 |
Classification
References
-
medium.com
/%40lamscun/how-do-i-change-htmli-from-low-to-critical-your-email-box-is-safe-e7171efd88fe
web, not-applicable
-
gist.githubusercontent.com
/minendie/4f23174687bc4d8eb7f727d9959b5399/raw/9ce573cebcce5521d9d6f826ab68f3780036b874/CVE-2024-28593.txt
web, third-party-advisory, advisory
-
docs.moodle.org
/403/en/Using_Chat
web, product
-
nvd.nist.gov
/vuln/detail/CVE-2024-28593
advisory, web
-
github.com
/moodle/moodle
package
Sources
- CVE List CVE-2024-28593
- GitHub Advisory GHSA-f6mh-79vh-2hv7
- NVD CVE-2024-28593
- OSV BIT-moodle-2024-28593
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.