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VulnerabilityPublished

CVE-2026-124491: JiHong88 suneditor · Cross-site Scripting

Affects JiHong88 suneditorSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium : upgrade to 3.4.0 when convenient.

Data as of 8 Nov 2026, 13:35 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.05.3
CNA (VulnCheck)CVSS 3.16.4
Patch
Available – fixed in 3.4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

What to do

Upgrade JiHong88 suneditor to 3.4.0.

Affected software

ProductAffectedFixed in
JiHong88suneditorAffected
  • <3.4.0
Fixed in
  • 3.4.0

AI-suggested

Upgrade SunEditor to version 3.4.0 or later, where this vulnerability is fixed. No other mitigation is required as the fix addresses the improper neutralization of input in the FileUpload plugin.

Description

SunEditor versions before 3.4.0 have a stored cross-site scripting (XSS) vulnerability in the FileUpload plugin's create() method. This flaw occurs because server-returned file names are assigned to innerHTML without proper escaping, allowing attackers to upload files with malicious HTML content. When such content or gallery items are loaded, the embedded JavaScript executes in victims' browsers, potentially leading to session theft. The vulnerability is fixed in version 3.4.0.

References

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