What is the CVSS score of CVE-2023-34959?

CVE-2023-34959 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.6%.

Is there a patch available for CVE-2023-34959?

Yes, a patch is available for CVE-2023-34959. Update the affected software to the latest version immediately.

Chamilo CVE-2023-34959

MEDIUM

Server-Side Request Forgery (SSRF) (CWE-918)

2023-06-08 cve@mitre.org

SSRF Chamilo Lms Chamilo

5.3

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-918 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V4 - API and Web Service URL allowlisting, SSRF prevention MITRE ATT&CK 2 techniques across 2 tactics: Initial Access, Credential Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 5.3 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	A remote attacker could make the server perform requests to unintended internal or external resources by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.6% exploitation probability (EPSS)

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AnalysisAI

An issue in Chamilo v1.11.* up to v1.11.18 allows attackers to execute a Server-Side Request Forgery (SSRF) and obtain information on the services running on the server via crafted requests in the. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate and allowlist destination URLs, block requests to internal networks, use network segmentation.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Server-Side Request Forgery (SSRF) (CWE-918), which allows attackers to make the server perform requests to unintended internal or external resources. An issue in Chamilo v1.11.* up to v1.11.18 allows attackers to execute a Server-Side Request Forgery (SSRF) and obtain information on the services running on the server via crafted requests in the social and links tools. Affected products include: Chamilo Chamilo Lms.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

DescriptionNVD

Threat Intelligence Overview

EPSS Score

0.6%

Top 55% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.6%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +26

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Server-Side Request Forgery HIGH

Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.

Affected Products (CPE)NVD

cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*

More in Chamilo

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CVE-2023-34960 CRITICAL Emergency POC

9.8 Aug 01

A command injection vulnerability in the wsConvertPpt component of Chamilo v1.11.* up to v1.11.18 allows attackers to ex

CVE-2025-50187 CRITICAL Act Now POC

9.8 Mar 02

Chamilo LMS prior to 1.11.28 has a code injection through SOAP request parameters enabling remote code execution.

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9.8 Mar 02

Chamilo LMS prior to 1.11.30 has a time-based SQL injection in a different endpoint, providing an additional database ex

CVE-2025-50190 CRITICAL Act Now POC

9.8 Mar 02

Chamilo LMS prior to 1.11.30 has an error-based SQL injection enabling database extraction.

CVE-2023-3545 CRITICAL Act Now POC

9.8 Nov 28

Improper sanitisation in `main/inc/lib/fileUpload.lib.php` in Chamilo LMS <= v1.11.20 on Windows and Apache installation

CVE-2023-3533 CRITICAL Act Now POC

9.8 Nov 28

Path traversal in file upload functionality in `/main/webservices/additional_webservices.php` in Chamilo LMS <= v1.11.20

CVE-2023-3368 CRITICAL Act Now POC

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Command injection in `/main/webservices/additional_webservices.php` in Chamilo LMS <= v1.11.20 allows unauthenticated at

CVE-2021-35414 CRITICAL Act Now POC

9.8 Dec 03

Chamilo LMS v1.11.x was discovered to contain a SQL injection via the doc parameter in main/plagiarism/compilatio/upload

CVE-2021-34187 CRITICAL Act Now POC

9.8 Jun 28

main/inc/ajax/model.ajax.php in Chamilo through 1.11.14 allows SQL Injection via the searchField, filters, or filters2 p

CVE-2019-13082 CRITICAL Act Now POC

9.8 Jun 30

Chamilo LMS 1.11.8 and 2.x allows remote code execution through an lp_upload.php unauthenticated file upload feature. Ra

CVE-2025-50199 CRITICAL Act Now POC

9.1 Mar 02

Chamilo LMS prior to 1.11.30 has a blind SSRF vulnerability enabling internal network reconnaissance from the learning p

CVE-2023-4220 MEDIUM This Month POC

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Unrestricted file upload in big file upload functionality in `/main/inc/lib/javascript/bigupload/inc/bigUpload.php` in C

Same weakness CWE-918 – Server-Side Request Forgery (SSRF)

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CVE-2021-26855 CRITICAL POC

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CVE-2021-21985 CRITICAL POC

9.8

CVE-2022-41040 HIGH POC

8.8

CVE-2024-21893 HIGH POC

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CVE-2021-40438 CRITICAL POC

9.0

CVE-2021-22054 HIGH POC

7.5

CVE-2021-21975 HIGH POC

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Same technique SSRF

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CVE-2016-3718 MEDIUM POC

5.5

References

Advisories & patches

PATCH https://github.com/chamilo/chamilo-lms/commit/cc278f01864948b1fb160e03f0a3dc0875d5f81f PATCH https://github.com/chamilo/chamilo-lms/commit/ea5791ff8ce6ea45148a171b0da5348a7c415e6f PATCH https://github.com/chamilo/chamilo-lms/commit/ed946908fef23e8aa4cefc28f745f3cd6710099f ADVISORY https://support.chamilo.org/projects/1/wiki/Security_issues#Issue-111-2023-04-20-Moderate-impact-Low-risk-Multiple-blind-SSRF-in-links-and-social-tools

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GitHub PoC

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