CVE-2026-40105Network attack vector

Reflected XSS via unescaped revision parameters

Published Apr 15, 2026 · Updated Apr 15, 2026

Reflected XSS in affected XWiki Platform releases allows remote attackers to execute JavaScript in a user's browser via a crafted compare URL. The changesdoc.vm template interpolates attacker-controlled rev1 and rev2 parameters into link query strings without URL escaping, allowing markup delimiters into generated links. A user must open the crafted comparison URL; execution occurs in that user's session, and an administrator victim exposes the entire instance.

CVSS severity6.5
Medium
EPSS probability0.55%
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 affected XWiki Platform releases allows remote attackers to execute JavaScript in a user's browser via a crafted compare URL. The changesdoc.vm template interpolates attacker-controlled rev1 and rev2 parameters into link query strings without URL escaping, allowing markup delimiters into generated links. A user must open the crafted comparison URL; execution occurs in that user's session, and an administrator victim exposes the entire instance.

The record

CVE
CVE-2026-40105
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
CryptPad
Product
XWiki Platform
Classifications
CWE-80, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 10.4-rc-1, < 16.10.16
  2. Affected versionversion=>= 17.0.0-rc-1, < 17.4.8
  3. Affected versionversion=>= 17.5.0-rc-1, < 17.10.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CryptPad · XWiki Platformversion=>= 10.4-rc-1, < 16.10.16; version=>= 17.0.0-rc-1, < 17.4.8; version=>= 17.5.0-rc-1, < 17.10.1

Published CVSS scores

6.5GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
6.1NVDCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1203Exploitation for Client Execution

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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