CVE-2025-34032Known exploitationPublic exploitNetwork attack vector

Browser script execution via unsanitized data reflection

Published Jun 24, 2025 · Updated May 14, 2026

Reflected XSS in Moodle Jmol Plugin 6.1 and earlier allows remote attackers to run JavaScript in a victim's browser via a crafted link. The jsmol.php saveFile branch copies the data request parameter directly into the response body and accepts its attacker-controlled MIME type without sanitization. Exploitation requires a victim to open the link, after which script runs in the Moodle origin and can hijack sessions or alter page content.

CVSS severity5.1
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Moodle Jmol Plugin 6.1 and earlier allows remote attackers to run JavaScript in a victim's browser via a crafted link. The jsmol.php saveFile branch copies the data request parameter directly into the response body and accepts its attacker-controlled MIME type without sanitization. Exploitation requires a victim to open the link, after which script runs in the Moodle origin and can hijack sessions or alter page content.

The record

CVE
CVE-2025-34032
Published
Jun 24, 2025
Updated
May 14, 2026
Vendor
Moodle
Product
Jmol Plugin
Classifications
CWE-79, CAPEC-591, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 2, 2025Exploitation reportedShadowserver exploitation observation
  2. Jun 24, 2025CVE publishedPublication date reported by the CVE source.
  3. May 14, 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?

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

  1. Affected versionversion=0 <=6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moodle · Jmol Pluginversion=0 <=6.1

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1189Drive-by Compromise

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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