CVE-2026-113355CWE-79cross-site-scripting

CVE-2026-113355

Medium · published October 20, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
13.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
4.8 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00229 · 13.0th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-20T15:17Z
References (5)
https://github.com/chatwoot/chatwoot/blob/88ffa329eb6e18ae06b608d8b4bab96c0e1b8f44/lib/custom_markdown_renderer.rb#L75-L84 · [email protected]https://github.com/chatwoot/chatwoot/commit/2192af80f405c70e3021191ff8b3f7e539c35e9d · [email protected]https://github.com/chatwoot/chatwoot/pull/14140 · [email protected]https://github.com/chatwoot/chatwoot/releases/tag/v4.14.0 · [email protected]https://www.vulncheck.com/advisories/chatwoot-before-4.14.0-stored-xss-via-help-center-video-embed-links · [email protected]
EPSS history
Timeline
  • 22 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 20 OCT 10:41Z
    Chatwoot before 4.14.0 Stored XSS via Help Center Video Embed Links
    cvelistv5
  • 20 OCT 10:41Z
    Chatwoot before 4.14.0 Stored XSS via Help Center Video Embed Links
    cvelistv5