CVE-2023-37304Public exploitNetwork attack vector

Stored XSS via unsafe column-alignment replacement

Published Jun 30, 2023 · Updated Nov 26, 2024

Cross-site scripting in the DoubleWiki extension for MediaWiki 1.39.3 and earlier allows remote authenticated users to execute script. DoubleWiki::addMatchingTags() applies broad regular-expression and string replacements to rendered HTML, letting crafted alignment text escape into event-handler markup. A reader must open the side-by-side view and click the crafted aligned text; the script then runs in that reader's browser under the wiki's origin.

CVSS severity5.4
Medium
EPSS probability0.50%
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 the DoubleWiki extension for MediaWiki 1.39.3 and earlier allows remote authenticated users to execute script. DoubleWiki::addMatchingTags() applies broad regular-expression and string replacements to rendered HTML, letting crafted alignment text escape into event-handler markup. A reader must open the side-by-side view and click the crafted aligned text; the script then runs in that reader's browser under the wiki's origin.

The record

CVE
CVE-2023-37304
Published
Jun 30, 2023
Updated
Nov 26, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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 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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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