Unrated

Path Traversal in XWiki Platform Old Core /skin/ Endpoint on Jetty 12+

IdentifiersCVE-2026-34151CWE-22

CVE-2026-34151 is a path traversal vulnerability in XWiki Platform Old Core affecting the /skin/ action endpoint when XWiki is deployed on Jetty 12 or later. The flaw allows crafted request paths to traverse directories and access arbitrary resources that are readable by the Jetty process. According to the advisory, this can expose sensitive files such as /etc/passwd as well as XWiki configuration files located under WEB-INF. The issue is deployment-specific and is described as affecting Jetty 12+; Tomcat and earlier Jetty versions are stated as not impacted.

For your environment

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows unauthorized read access to arbitrary files and application resources accessible to the Jetty instance. This can disclose sensitive operating system files, XWiki configuration data, and potentially other secrets or internal resources exposed through the application server's readable path space. The primary impact is information disclosure, which may enable follow-on attacks depending on the contents of exposed files.

Mitigation

If you can’t patch tonight, do this now.

If immediate upgrade is not possible, avoid deploying the affected XWiki versions on Jetty 12 or later. The advisory states that using a different application server is a workaround, including Jetty versions earlier than 12 for XWiki versions earlier than 17, or Tomcat, which is stated as not impacted.

Remediation

Patch, then assume compromise.

Upgrade XWiki Platform Old Core to a patched release. The advisory specifies fixed versions 17.10.5 and 18.2.0 or later, depending on the affected branch.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

XwikiXwiki-Platform-Oldcoreapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

No public activity tracked yet. Mallory keeps watching.

0 SOURCESView more in app

No public activity observed for this vulnerability.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity