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Fencer Vulns
critical 9.8

CVE-2021-3878 json

Improper Restriction of XML External Entity Reference in stanfordnlp/corenlp

published 2021-10-15 5 y ago modified 2026-06-17 4 mo ago also GHSA-5h9g-8xcv-qjq9 , EUVD-2022-2592

cvss
9.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

corenlp is vulnerable to Improper Restriction of XML External Entity Reference

Patch / fix

  • maven edu.stanford.nlp:stanford-corenlp 4.3.1
  • stanford corenlp 4.3.1

Exploit prediction

1.89% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/a11c889b-ccff-4fea-9e29-963a23a63dd2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven edu.stanford.nlp:stanford-corenlp
<4.3.1
4.3.1

Affected products

  • stanfordnlp stanfordnlp/corenlp

Classification

Weakness
  • CWE-611 Improper Restriction of XML External Entity Reference

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.