CVE-2023-34959Network attack vector

Service enumeration via unrestricted server-side URL requests

Published Jun 8, 2023 · Updated Jan 6, 2025

Server-side request forgery in Chamilo LMS 1.11.0 through 1.11.18 allows remote attackers to enumerate server-reachable services. The social OpenGraph endpoint passes the unauthenticated social_wall_new_msg_main URL to cURL, while the links tool likewise requests a supplied URL without restricting internal destinations. No account is needed for the social endpoint, and the blind response oracle discloses whether services reachable from the application server respond.

CVSS severity5.3
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Chamilo LMS 1.11.0 through 1.11.18 allows remote attackers to enumerate server-reachable services. The social OpenGraph endpoint passes the unauthenticated social_wall_new_msg_main URL to cURL, while the links tool likewise requests a supplied URL without restricting internal destinations. No account is needed for the social endpoint, and the blind response oracle discloses whether services reachable from the application server respond.

The record

CVE
CVE-2023-34959
Published
Jun 8, 2023
Updated
Jan 6, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, T1046
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Discovery

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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