CVE-2023-31802Network attack vector

Cross-user script execution via unfiltered profile fields

Published May 9, 2023 · Updated Jul 9, 2026

Stored cross-site scripting in personal profiles in Chamilo LMS 1.11.18 allows remote authenticated users to run script in other users' browsers. The extra-field form path in main/inc/lib/extra_field.lib.php applies only trimming to skype and linkedin_url values, then stores them for profile display without HTML filtering. A normal account must populate an enabled field, and script executes only when a friend or administrator views the attacker's social-network profile.

CVSS severity5.4
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in personal profiles in Chamilo LMS 1.11.18 allows remote authenticated users to run script in other users' browsers. The extra-field form path in main/inc/lib/extra_field.lib.php applies only trimming to skype and linkedin_url values, then stores them for profile display without HTML filtering. A normal account must populate an enabled field, and script executes only when a friend or administrator views the attacker's social-network profile.

The record

CVE
CVE-2023-31802
Published
May 9, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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