HOMEVULNERABILITIESCVE-2023-26477
CRITICAL

CVE-2023-26477

CWE-95Published: March 2, 2023· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

XWiki Platform is a generic wiki platform. Starting in versions 6.3-rc-1 and 6.2.4, it's possible to inject arbitrary wiki syntax including Groovy, Python and Velocity script macros via the `newThemeName` request parameter (URL parameter), in combination with additional parameters. This has been patched in the supported versions 13.10.10, 14.9-rc-1, and 14.4.6. As a workaround, it is possible to edit `FlamingoThemesCode.WebHomeSheet` and manually perform the changes from the patch fixing the issue.

NVD Source

Technical Analysis

CVE-2023-26477 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

xwiki1 product(s)
xwiki
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284
PATCHhttps://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284
ADVISORYhttps://github.com/xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpg
ADVISORYhttps://jira.xwiki.org/browse/XWIKI-19757
ADVISORYhttps://github.com/xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpg
ADVISORYhttps://jira.xwiki.org/browse/XWIKI-19757

All References (6)

→
https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284Patch
→
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpgExploit · Vendor Advisory
→
https://jira.xwiki.org/browse/XWIKI-19757Exploit · Issue Tracking · Vendor Advisory
→
https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284Patch
→
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpgExploit · Vendor Advisory
→
https://jira.xwiki.org/browse/XWIKI-19757Exploit · Issue Tracking · Vendor Advisory

Quick Facts

CVE IDCVE-2023-26477
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-95
CISA KEVNo
Affected1 vendor(s)
PublishedMar 2, 2023

Related CVEs (CWE-95)

CVE-2013-10070
10.0
CVE-2026-44643
10.0
CVE-2021-23277
10.0
CVE-2025-55727
9.8
CVE-2025-55728
9.8
CVE-2024-36404
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-26477 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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