CVE-2026-52854Public exploitNetwork attack vector

Stored XSS via unescaped overlay labels

Published Aug 18, 2026 · Updated Aug 19, 2026

Stored XSS in ProfessionalWiki Maps before 12.1.3 allows attackers to execute script in another user's browser via crafted wikitext. In the Leaflet service, display_map accepts attacker-controlled HTML in the overlays parameter, and resources/leaflet/jquery.leaflet.js uses each overlay name as a Leaflet layer-control label without escaping it. Any wiki user with edit permission can plant the payload, which runs when another user previews or views the map and can access or act through that user's session.

CVSS severity8.6
High
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in ProfessionalWiki Maps before 12.1.3 allows attackers to execute script in another user's browser via crafted wikitext. In the Leaflet service, display_map accepts attacker-controlled HTML in the overlays parameter, and resources/leaflet/jquery.leaflet.js uses each overlay name as a Leaflet layer-control label without escaping it. Any wiki user with edit permission can plant the payload, which runs when another user previews or views the map and can access or act through that user's session.

The record

CVE
CVE-2026-52854
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Professional Wiki
Product
Maps
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 12.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Professional Wiki · Mapsversion=< 12.1.3

Published CVSS scores

8.6GitHub Advisory DatabaseCVSS: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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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