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Fencer Vulns
critical 9.0

CVE-2023-3020 json

Cross-site Scripting (XSS) - Reflected in mkucej/i-librarian-free

published 2023-05-31 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-43712

cvss
9.0
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

Cross-site Scripting (XSS) - Reflected in GitHub repository mkucej/i-librarian-free prior to 5.10.4.

Patch / fix

  • mkucej mkucej/i-librarian-free 5.10.4

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
21 mo ago

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/92cbe37c-33fa-43bf-8d5b-69aebf51d32c referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 9.0 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

  • mkucej mkucej/i-librarian-free

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.