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Fencer Vulns
high 8.1

CVE-2021-21479 in the critical feed json

Remote Code Execution in SCIMono

published 2021-02-09 5 y ago modified 2026-06-17 4 mo ago also GHSA-29q4-gxjq-rx5c , EUVD-2021-0526

cvss
8.1
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
10.1%
EPSS 10.1% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known, plus a Nuclei check

Summary

In SCIMono before 0.0.19, it is possible for an attacker to inject and execute java expression compromising the availability and integrity of the system.

Patch / fix

  • maven com.sap.scimono:scimono-server 0.0.19
  • sap scimono 0.0.19

Exploit prediction

10.12% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.0 8.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:N/I:P/A:P

Affected packages

ecosystem package affected fixed in
maven com.sap.scimono:scimono-server
<0.0.19
0.0.19

Affected products

  • SAP SE SCIMono

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
  • CWE-59 Improper Link Resolution Before File Access
  • CWE-62 UNIX Hard Link
  • CWE-690 Unchecked Return Value to NULL Pointer Dereference
  • CWE-77 Improper Neutralization of Special Elements used in a Command
  • CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement

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.