CVE-2023-46858Public exploitNetwork attack vector

Teacher-authenticated script execution via reflected searchvalue

Published Oct 29, 2023 · Updated Aug 2, 2024

Reflected XSS in Moodle 4.3 allows remote authenticated users with teacher access to execute script through a crafted grader-report search. The grader report at /grade/report/grader/index.php reflects the searchvalue query parameter into the returned page without safely neutralizing script-capable input. A teacher session and victim interaction are required, and Moodle disputes the security impact because teachers are trusted to post XSS-capable course content.

CVSS severity5.4
Medium
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Moodle 4.3 allows remote authenticated users with teacher access to execute script through a crafted grader-report search. The grader report at /grade/report/grader/index.php reflects the searchvalue query parameter into the returned page without safely neutralizing script-capable input. A teacher session and victim interaction are required, and Moodle disputes the security impact because teachers are trusted to post XSS-capable course content.

The record

CVE
CVE-2023-46858
Published
Oct 29, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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