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Fencer Vulns
medium 6.1

CVE-2023-26149 json

quill-mention Cross-site Scripting vulnerability

published 2023-09-28 3 y ago modified 2026-06-17 4 mo ago also GHSA-jgw5-rp4p-qhp6 , EUVD-2023-2536

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

Versions of the package quill-mention before 4.0.0 are vulnerable to Cross-site Scripting (XSS) due to improper user-input sanitization, via the renderList function. **Note:** If the mentions list is sourced from unsafe (user-sourced) data, this might allow an injection attack when a Quill user hits @.

Patch / fix

  • npm quill-mention 4.0.0
  • n/a quill-mention 4.0.0

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • codepen.io https://codepen.io/ALiangLiang/pen/mdQMJXK referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/quill-mention/quill-mention/issues/255 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
npm quill-mention
<4.0.0
4.0.0

Affected products

  • n/a quill-mention

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.