CVE-2023-4223· NVD / CVE Program· CNA STAR_Labs

Chamilo LMS File Upload Functionality Remote Code Execution

Noroxi assessment

Priority: Monitor (action score 36/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 1.8% (FIRST EPSS); higher than 78.7% of all records.
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
No fixed version is recorded, but the references include a patch (commit or PR) link.

Low priority for now. See the fix and affected versions sections below.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Unrestricted file upload in `/main/inc/ajax/document.ajax.php` in Chamilo LMS <= v1.11.24 allows authenticated attackers with learner role to obtain remote code execution via uploading of PHP files.

HighCVSS 8.8 · v3.1—No exploit No fix recorded

Published: Nov 28, 2023
Updated: Jun 17, 2026
EPSS: 1.8% · 78th percentile
CWE: CWE-434

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 35 / 40 · 8.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 1.8%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 8.8
CNA · STAR_Labs: 8.8; agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
chamilo	chamilo lms	cpe:2.3:a:chamilo:chamilo_lms

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

chamilo chamilo lmsup to 1.11.24 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (STAR_Labs). Independent of NVD's CPE analysis and usually ahead of it.

Chamilo Chamilo
- up to and including 1.11.24affected · semver

Same product

chamilo: all records

Other highest-scoring records for the same primary product.

CVE-2023-4220Chamilo LMS Unauthenticated Big Upload File Remote Code Execution
60This week
CVE-2021-35414Chamilo LMS v1.11.x was discovered to contain a SQL injection via the doc parameter in main/plagiarism/compilatio/upload.php.
40Plan
CVE-2019-13082Chamilo LMS 1.11.8 and 2.x allows remote code execution through an lp_upload.php unauthenticated file upload feature.
40Plan

Published before and after this one in the same product

← EarlierCVE-2023-4221Nov 28, 2023 · Chamilo LMS Learning Path PPT2LP Command Injection Vulnerability
36Monitor
← EarlierCVE-2023-4222Nov 28, 2023 · Chamilo LMS Learning Path PPT2LP Command Injection Vulnerability
36Monitor
Later →CVE-2023-4224Nov 28, 2023 · Chamilo LMS File Upload Functionality Remote Code Execution
36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Ngo Wei Lin (@Creastery)STAR Labs SG Pte. Ltd. (@starlabs_sg)finder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2023-42200 days apartChamilo LMS Unauthenticated Big Upload File Remote Code Execution
60This week
CVE-2023-34944168 days apartAn arbitrary file upload vulnerability in the /fileUpload.lib.php component of Chamilo 1.11.* up to v1.11.18 allows attackers to execute arb
39Monitor
CVE-2023-42240 days apartChamilo LMS File Upload Functionality Remote Code Execution
36Monitor
CVE-2023-42250 days apartChamilo LMS File Upload Functionality Remote Code Execution
36Monitor
CVE-2023-42260 days apartChamilo LMS File Upload Functionality Remote Code Execution
36Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).