CVE-2025-10331Public exploitNetwork attack vector

Stored XSS via unescaped fetched page title

Published Sep 13, 2025 · Updated Sep 13, 2025

Stored cross-site scripting in Colin Devroe Unmark 1.9.0 through 1.9.3 allows remote authenticated users to run script via a crafted page title. Marks.php loads a remote page title through DOMDocument::loadHTMLFile and stores it without filtering, while info.php prints the title without HTML escaping. Exploitation requires a low-privileged account and user interaction, resulting in stored script execution in the viewer's browser.

CVSS severity5.4
Medium
EPSS probability0.28%
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 Colin Devroe Unmark 1.9.0 through 1.9.3 allows remote authenticated users to run script via a crafted page title. Marks.php loads a remote page title through DOMDocument::loadHTMLFile and stores it without filtering, while info.php prints the title without HTML escaping. Exploitation requires a low-privileged account and user interaction, resulting in stored script execution in the viewer's browser.

The record

CVE
CVE-2025-10331
Published
Sep 13, 2025
Updated
Sep 13, 2025
Vendor
Colin Devroe
Product
Unmark
Classifications
CWE-79, CWE-94, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 13, 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=1.9.0
  2. Affected versionversion=1.9.1
  3. Affected versionversion=1.9.2
  4. Affected versionversion=1.9.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Colin Devroe · Unmarkversion=1.9.0; version=1.9.1; version=1.9.2; version=1.9.3

Published CVSS scores

3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
2.0VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
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.

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
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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