CVE-2026-52854: ProfessionalWiki Maps · Cross-site Scripting
Affects ProfessionalWiki MapsSource CVE Database V5
Public exploit available · CVSS 8.6 High : upgrade to 12.1.3 as a priority.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- CISA SSVC
- Exploitation
- Proof of concept is public or traded
- Automatable
- Attackers can reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-08-19.
- Patch
- Available – fixed in 12.1.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:LExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 18 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CISA SSVC: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by GitHub, Inc.
, 71 days before disclosure
CVE published
on cve.org
, t = 0
CISA SSVC assessment
proof of concept public
, 21 hours after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA SSVC, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade ProfessionalWiki Maps to 12.1.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| ProfessionalWikiMaps | Affected
| Fixed in
|
Description
Maps is a MediaWiki extension that enables visualization of geographic data through dynamic embedded maps. Prior to version 12.1.3, the display_map parser function in the Leaflet service accepts attacker-controlled HTML in the overlays parameter, and resources/leaflet/jquery.leaflet.js uses the overlay name as a Leaflet layer-control label without escaping it. A wiki user with the edit permission can store malicious wikitext that causes script execution when another user previews or views the affected map. The script executes in the viewing user's browser session and can access data or perform actions available to that user. This issue is fixed in version 12.1.3.
References
- github.com/ProfessionalWiki/Maps/security/advisories/GHSA-4h7g-5542-v3fc (opens in a new tab)
- github.com/ProfessionalWiki/Maps/pull/899 (opens in a new tab)
- github.com/ProfessionalWiki/Maps/commit/737a993fc2f40499e9bb22198fd1d56c25613806 (opens in a new tab)
- github.com/ProfessionalWiki/Maps/blob/12.1.3/RELEASE-NOTES.md (opens in a new tab)
- github.com/ProfessionalWiki/Maps/releases/tag/12.1.3 (opens in a new tab)