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Fencer Intel
medium 6.8

CVE-2021-4103 json

Cross-site Scripting (XSS) - Stored in vanessa219/vditor

published 4y ago modified 4mo ago also GHSA-cxm3-v4mv-6mh8 , EUVD-2022-0572

cvss
6.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

Cross-site Scripting (XSS) - Stored in GitHub repository vanessa219/vditor prior to 1.0.34.

Patch / fix

  • npm vditor 3.8.11
  • vanessa219 vanessa219/vditor 1.0.34

Is CVE-2021-4103 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/67b980af-7357-4879-9448-a926c6474225 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 6.8 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:L
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N
GitHub 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
npm vditor
<3.8.11
3.8.11

Affected products

  • vanessa219 vanessa219/vditor

Classification

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

References

Sources

Fencer Intel 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.