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CVE-2023-26477

70
FAUCET Score

CVE-2023-26477 is a critical vulnerability affecting XWiki Platform versions 6.3-rc-1 and 6.2.4 and later, allowing for arbitrary wiki syntax injection, including Groovy, Python, and Velocity script macros, via the newThemeName URL parameter. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While patches are available in supported versions 13.10.10, 14.9-rc-1, and 14.4.6, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.2.4, < 13.10.10CPE matchmatch criteria
cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*
>= 14.0, < 14.4.6CPE matchmatch criteria
cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*
>= 14.5, < 14.9CPE matchmatch criteria
cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

10.0CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
74.76%
Probability of exploitation in next 30 days
EPSS Percentile
99.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.7476 is in the 98th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: org.xwiki.platform:xwiki-platform-flamingo-theme-uiFixed in: 13.10.10
mavenpatch availablevia ghsa
Product: org.xwiki.platform:xwiki-platform-flamingo-theme-uiFixed in: 14.4.6
mavenpatch availablevia ghsa
Product: org.xwiki.platform:xwiki-platform-flamingo-theme-uiFixed in: 14.9-rc-1

Vendor Advisories (1)

mavenGHSA-x2qm-r4wx-8gpgcritical

org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability

Mar 3, 2023

References

github.com / xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2
Patch
github.com / xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpg
ExploitVendor Advisory
jira.xwiki.org / browse/XWIKI-19757
ExploitIssue TrackingVendor Advisory