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Fencer Intel
medium 5.4

CVE-2021-37271 json

Cross Site Scripting (XSS) vulnerability exists in UEditor v1.4.3.3, which can be exploited by an attacker to obtain user cookie informatio…

published 5y ago modified 4mo ago also EUVD-2021-23843

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

Cross Site Scripting (XSS) vulnerability exists in UEditor v1.4.3.3, which can be exploited by an attacker to obtain user cookie information.

Is CVE-2021-37271 in your stack? 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

0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • freebuf.com https://www.freebuf.com/vuls/269956.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
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

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.