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Fencer Vulns
medium 4.3

CVE-2021-23266 json

Improper Output Neutralization for Logs in Crafter Studio

published 2022-05-16 4 y ago modified 2026-06-17 4 mo ago also GHSA-545f-pgp7-fwjf , EUVD-2022-2491

cvss
4.3
version 3.1, CNA
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

An anonymous user can craft a URL with text that ends up in the log viewer as is. The text can then include textual messages to mislead the administrator.

Patch / fix

  • maven org.craftercms:craftercms 3.1.18
  • craftercms crafter_cms 3.1.18

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

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

Affected packages

ecosystem package affected fixed in
maven org.craftercms:craftercms
>=3.1.0, <3.1.18
3.1.18

Affected products

  • Crafter Software Crafter CMS

Classification

Weakness
  • CWE-117 Improper Output Neutralization for Logs
  • CWE-116 Improper Encoding or Escaping of Output

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.