CVE-2023-26479Public exploitNetwork attack vector

Page denial of service via parser stack exhaustion

Published Mar 2, 2023 · Updated Mar 5, 2025

Denial of service in affected XWiki Platform releases allows remote authenticated users to make pages and indexes unusable via page content. DefaultContentParser.parse delegates deeply nested XWiki 2.1 group blocks to recursive parsing without containing the resulting StackOverflowError, so title rendering propagates the failure. Write rights are required; a crafted saved page can disable that page and related indexes while also preventing normal editor-based removal.

CVSS severity6.5
Medium
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected XWiki Platform releases allows remote authenticated users to make pages and indexes unusable via page content. DefaultContentParser.parse delegates deeply nested XWiki 2.1 group blocks to recursive parsing without containing the resulting StackOverflowError, so title rendering propagates the failure. Write rights are required; a crafted saved page can disable that page and related indexes while also preventing normal editor-based removal.

The record

CVE
CVE-2023-26479
Published
Mar 2, 2023
Updated
Mar 5, 2025
Vendor
CryptPad
Product
XWiki Platform
Classifications
CWE-755, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2025Record 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=>= 14.0, < 14.4.6
  2. Affected versionversion=>= 14.5, < 14.9-rc-1
  3. Affected versionversion=>= 6.0, < 13.10.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CryptPad · XWiki Platformversion=>= 14.0, < 14.4.6; version=>= 14.5, < 14.9-rc-1; version=>= 6.0, < 13.10.10

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

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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-755Improper Handling of Exceptional Conditions
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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