CVE-2025-21612Public exploitNetwork attack vector

Cross-site scripting via unescaped invalid page names

Published Jan 6, 2025 · Updated Aug 26, 2025

Cross-site scripting in TabberNeue before 2.7.2 allows remote attackers to execute script in another user's browser via crafted wikitext. TabberTransclude.php inserts a user-supplied invalid page name directly into an HTML error div without escaping it. An attacker must cause another user to render the wikitext by viewing an editable page or opening a crafted Special:ExpandTemplates link, enabling script execution in that user's wiki session.

CVSS severity8.6
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in TabberNeue before 2.7.2 allows remote attackers to execute script in another user's browser via crafted wikitext. TabberTransclude.php inserts a user-supplied invalid page name directly into an HTML error div without escaping it. An attacker must cause another user to render the wikitext by viewing an editable page or opening a crafted Special:ExpandTemplates link, enabling script execution in that user's wiki session.

The record

CVE
CVE-2025-21612
Published
Jan 6, 2025
Updated
Aug 26, 2025
Vendor
StarCitizen.tools
Product
TabberNeue
Classifications
CWE-79, CWE-80, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 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=>= 1.9.1, < 2.7.2
  2. Affected versionversion=>= d8c3db4e5935476e496d979fb01f775d3d3282e6, < f229cab099c69006e25d4bad3579954e481dc566

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

StarCitizen.tools · TabberNeueversion=>= 1.9.1, < 2.7.2; version=>= d8c3db4e5935476e496d979fb01f775d3d3282e6, < f229cab099c69006e25d4bad3579954e481dc566

Published CVSS scores

8.6GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
8.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1189Drive-by Compromise

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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