What is CVE-2026-113355?

CVE-2026-113355 is a medium-severity vulnerability in Chatwoot, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-10-20.

How severe is CVE-2026-113355?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Chatwoot

CVE-2026-113355

Chatwoot before 4.14.0 contains a stored cross-site scripting vulnerability that allows account administrators to inject JavaScript by crafting video-embed links in Help Center articles. Attackers can use angle-bracket link destinations with double quotes to break out of the unescaped iframe src attribute in render_embed_from_match, executing scripts for public visitors and stealing cw_conversation widget tokens.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-20 · last modified 2026-10-20.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Chatwoot

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/chatwoot/chatwoot/pull/14140 (issue-tracking, patch)
github.com/chatwoot/chatwoot/commit/2192af80f405c70e3021191ff8b3f7e539c35e9d (patch)
github.com/chatwoot/chatwoot/releases/tag/v4.14.0 (release-notes)
github.com/chatwoot/chatwoot/blob/88ffa329eb6e18ae06b608d8b4bab96c0e1b8f44/lib/… (technical-description)
www.vulncheck.com/advisories/chatwoot-before-4.14.0-stored-xss-via-help-center-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-113355?: CVE-2026-113355 is a medium-severity vulnerability in Chatwoot, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-10-20.
How severe is CVE-2026-113355?: Medium severity. CVSS v3 base score is 4.8 out of 10.