Chamilo LMS has Authenticated SQL Injection in statistics.ajax.php users_active action (2.0 RC2)
Chamilo is an open-source learning management system (LMS). Version 2.0.0-RC.2 contains a SQL Injection vulnerability in the statistics AJAX endpoint, which is an incomplete fix for CVE-2026-30881. While CVE-2026-30881 was patched by applying Security::remove_XSS() to the date_start and date_end parameters in the get_user_registration_by_month action, the same parameters remain unsanitized in the users_active action within the same file (public/main/inc/ajax/statistics.ajax.php), where they are directly interpolated into a SQL query. An authenticated admin can exploit this to perform time-based blind SQL injection, enabling extraction of arbitrary data from the database. This issue has been fixed in version 2.0.0.
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- Apr 14, 2026
- Updated
- Jul 24, 2026
- EPSS
- 0.5% · 38th percentile
- CWE
- CWE-89
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Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 28 / 40 · 7.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · GitHub_M
- 7.1
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| 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 lms2.0.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
chamilo chamilo-lms
- >= 2.0.0-RC.2, < 2.0.0affected
Same product
chamilo: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-4220Chamilo LMS Unauthenticated Big Upload File Remote Code Execution47Plan
- 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
- CVE-2018-1999019Chamilo LMS version 11.x contains an Unserialization vulnerability in the "hash" GET parameter for the api endpoint located at /webservices/40Plan
- CVE-2026-33707Weak Password Recovery Mechanism for Forgotten Password in chamilo/chamilo-lms39Monitor
- CVE-2025-50187Chamilo: Evaluation of untrusted user input leads to Remote Code Execution39Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| chamilo chamilo-lms | 2.0.0 · description | Vendor (CNA) |
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.
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.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-2843029 days apartChamilo LMS Vulnerable to Unauthenticated SQL Injection in chamiko-lms model.ajax.php37Monitor
- CVE-2026-3088129 days apartChamilo LMS: SQL Injection in the statistics AJAX endpoint35Monitor
- CVE-2025-5019243 days apartChamilo: Time-based SQL Injection in /main/webservices/registration.soap.php35Monitor
- CVE-2025-5019043 days apartChamilo: Error-based SQL Injection via GET openid.assoc_handle with the /index.php script35Monitor
- CVE-2025-5019143 days apartChamilo: Error-based SQL Injection via POST userFile with the /main/exercise/hotpotatoes.php script28Monitor
- CVE-2025-5018843 days apartError-based SQL Injection in Chamilo LMS28Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
- CVE-2026-341600 days apartChamilo LMS: Unauthenticated SSRF via PENS Plugin allows attacker to probe internal network and reach cloud metadata services34Monitor
- CVE-2026-337150 days apartChamilo LMS has Unauthenticated SSRF and Open Email Relay via install.ajax.php test_mailer action28Monitor
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- 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.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- X
Weakness class (CWE)
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
Root cause
The query text is built by concatenating user input. The database cannot tell where the data ends and the command begins.
The bug in code
The whole CWE-89 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
const owner = req.query.owner;const rows = await db.query( "SELECT * FROM files WHERE owner = '" + owner + "'");Fixed
const owner = req.query.owner;const rows = await db.query( "SELECT * FROM files WHERE owner = $1", [owner]);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Expanding Control over the Operating System from the DatabaseCAPEC-470Very High
- SQL InjectionCAPEC-66likelihood: High · High
- Blind SQL InjectionCAPEC-7likelihood: High · High
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/chamilo/chamilo-lms/releases/tag/v2.0.0
- github.com/chamilo/chamilo-lms/security/advisories/GHSA-w8c4-c7r8-qgw2
Vendor advisories and official records. Exploit/PoC links are deliberately left out.