XWiki Platform vulnerable to Cross-Site Scripting (XSS) through conflict resolution

CVE-2024-41947 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

By creating a conflict when another user with more rights is currently editing a page, it is possible to execute JavaScript snippets on the side of the other user, which compromises the confidentiality, integrity and availability of the whole XWiki installation.

To reproduce on a XWiki instance, a user with admin rights needs to edit a document without saving right away.
Then, as another user without any other right than edit on the specific document, change the whole content to <script>alert('XSS')</script>.
When the admin user then saves the document, a conflict popup appears. If they select "Fix each conflict individually" and see an alert displaying "XSS", then the instance is vulnerable.

Patches

This has been patched in XWiki 15.10.8 and 16.3.0RC1.

Workarounds

We're not aware of any workaround except upgrading.

References

  • https://jira.xwiki.org/browse/XWIKI-21626
  • https://github.com/xwiki/xwiki-platform/commit/821d43ec45e67d45a6735a0717b9b77fffc1cd9f

For more information

If you have any questions or comments about this advisory:
* Open an issue in Jira XWiki.org
* Email us at Security Mailing List

Basic information

Type
reviewed
Severity
critical
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2024-07-31 16:54:36 UTC
Updated
2024-07-31 20:20:43 UTC
GitHub reviewed
2024-07-31 16:54:36 UTC
NVD published
2024-07-31

EPSS Score

Score Percentile
13.01% 93.98%

CVSS Scores

Base score Version Severity Vector
9.1 3.1 —
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
9.4 4.0 —
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:L)
Low privileges are required.
User interaction (UI:P)
A user has to participate (for example click/open/approve).
Vulnerable system confidentiality impact (VC:H)
High confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:H)
High integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:H)
High availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:H)
High confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:H)
High integrity impact on subsequent systems.
Subsequent system availability impact (SA:H)
High availability impact on subsequent systems.

Identifiers

Type Value
GHSA GHSA-692v-783f-mg8x ↗
CVE CVE-2024-41947 ↗

CWEs

CWE id Name
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Affected packages (2)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
maven org.xwiki.platform:xwiki-platform-web-templates >= 11.8-rc-1, < 15.10.8 15.10.8 —
maven org.xwiki.platform:xwiki-platform-web-templates >= 16.0.0-rc-1, < 16.3.0-rc-1 16.3.0-rc-1 —

References

cvelogic Threat Intelligence