CVE-2024-34312Public exploitNetwork attack vector

Session compromise via unsanitized jail-server messages

Published Jun 24, 2024 · Updated Mar 25, 2025

DOM-based XSS in Virtual Programming Lab 4.2.3 and earlier allows remote attackers to run script in a victim's Moodle session. The vplide.js run:browser handler concatenates an untrusted path from a jail-server WebSocket message into anchor HTML without sanitization. Exploitation requires a victim to use VPL through an attacker-controlled jail server; script runs with the victim's Moodle privileges, including administrative access for an administrator.

CVSS severity6.1
Medium
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in Virtual Programming Lab 4.2.3 and earlier allows remote attackers to run script in a victim's Moodle session. The vplide.js run:browser handler concatenates an untrusted path from a jail-server WebSocket message into anchor HTML without sanitization. Exploitation requires a victim to use VPL through an attacker-controlled jail server; script runs with the victim's Moodle privileges, including administrative access for an administrator.

The record

CVE
CVE-2024-34312
Published
Jun 24, 2024
Updated
Mar 25, 2025
Vendor
Virtual Programming Lab
Product
VPL Jail System
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Virtual Programming Lab · VPL Jail Systemversion=0 <=4.2.3

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

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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