What is CVE-2019-0186?

CVE-2019-0186 is a medium-severity vulnerability in Apache Pluto, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-04-26.

How severe is CVE-2019-0186?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2019-0186 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Apache Pluto

CVE-2019-0186

The input fields of the Apache Pluto "Chat Room" demo portlet 3.0.0 and 3.0.1 are vulnerable to Cross-Site Scripting (XSS) attacks. Mitigation: * Uninstall the ChatRoomDemo war file - or - * migrate to version 3.1.0 of the chat-room-demo war file

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-04-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.206 (97.5th percentile), scored 2026-10-01.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.206 · newest: 0.206 · change: 0.000

Affected products

Apache Pluto — versions 3.0.0, 3.0.1
Apache Software Foundation Pluto — versions 3.0.0, 3.0.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

portals.apache.org/pluto/security.html (Mitigation, Vendor Advisory)
mail-archives.apache.org/mod_mbox/portals-pluto-user/201904.mbox/<CAAqbB_ev=0KN… (mailing-list)
www.openwall.com/lists/oss-security/2019/04/25/8 (mailing-list, Mailing List, Third Party Advisory, Mitigation)
lists.apache.org/thread.html/d093e6b0e5f9b3b50928255451afefd8f8fbdcd5bf28a72676… (mailing-list)
www.exploit-db.com/exploits/46759/ (Exploit, VDB Entry, Third Party Advisory, exploit)
packetstormsecurity.com/files/152642/Apache-Pluto-3.0.0-3.0.1-Cross-Site-Script… (Exploit, Third Party Advisory)
www.securityfocus.com/bid/108091 (Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2019-0186?: CVE-2019-0186 is a medium-severity vulnerability in Apache Pluto, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-04-26.
How severe is CVE-2019-0186?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2019-0186 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.