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XwikiApplication

CVE-2023-26479

MEDIUM · 6.5 CVSS v3.1 Published 2023-03-02
Fix available
A fix is available. Upgrade to 13.10.10 / 14.4.6 or later.
See remediation →
71/100
Remediation priority · Elevated
Public exploit Remotely reachable Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
XWiki Platform is a generic wiki platform. Starting in version 6.0, users with write rights can insert well-formed content that is not handled well by the parser. As a consequence, some pages becomes unusable, including the user index (if the page containing the faulty content is a user page) and the page index. Note that on the page, the normal UI is completely missing and it is not possible to open the editor directly to revert the change as the stack overflow is already triggered while getting the title of the document. This means that it is quite difficult to remove this content once inserted. This has been patched in XWiki 13.10.10, 14.4.6, and 14.9-rc-1. A temporary workaround to avoid Stack Overflow errors is to increase the memory allocated to the stack by using the `-Xss` JVM parameter (e.g., `-Xss32m`). This should allow the parser to pass and to fix the faulty content. The consequences for other aspects of the system (e.g., performance) are unknown, and this workaround should be only be used as a temporary solution. The workaround does not prevent the issue occurring again with other content. Consequently, it is strongly advised to upgrade to a version where the issue has been patched.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
XwikiApplication
Affected:>= 6.0, < 13.10.10>= 14.0, < 14.4.6>= 14.5, < 14.9

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 13.10.10 / 14.4.6 / 14.9 or later
Fixed in 13.10.1014.4.614.9
Vendor patch github.com →
Recommended fix High confidence

XWiki 13.10.10, 14.4.6, or 14.9+ (depending on your current major/minor version)

  1. 1. Identify the currently running XWiki version using the administration dashboard or version detection.
  2. 2. Determine which upgrade path applies based on your current version branch (13.x, 14.0-14.4, or 14.5-14.8).
  3. 3. Back up the XWiki database and configuration files before proceeding with the upgrade.
  4. 4. Stop the XWiki application server.
  5. 5. Upgrade to XWiki 13.10.10 (for 13.x installations), 14.4.6 (for 14.0-14.4 installations), or 14.9 or later (for 14.5+ installations) following the standard upgrade documentation.
  6. 6. Start the XWiki application and verify that the platform functions correctly.
  7. 7. Test that pages with previously problematic content can be edited and saved without triggering stack overflow errors.
Caveat Standard upgrade risks apply - review XWiki release notes for your version branch for any migration requirements or deprecated features

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-26479 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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