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Fencer Vulns
medium 5.5

CVE-2021-3863 json

Cross-site Scripting (XSS) - Generic in snipe/snipe-it

published 2021-10-19 5 y ago modified 2026-06-17 4 mo ago also GHSA-5rg2-6qr5-2xp8 , EUVD-2021-2162

cvss
5.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

snipe-it is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Patch / fix

  • packagist snipe/snipe-it 5.3.0
  • snipe snipe/snipe-it 5.3.0

Exploit prediction

0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/1dbc8d79-1b53-44a3-a576-faec78f29ba0 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 5.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub 3.0 5.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
packagist snipe/snipe-it
<5.3.0
5.3.0

Affected products

  • snipe snipe/snipe-it

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.