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Fencer Vulns
high 8.1

CVE-2019-10754 json

Use of Insufficiently Random Values in Apereo CAS

published 2019-09-23 7 y ago modified 2026-06-17 4 mo ago also GHSA-g24w-373r-5pxg , EUVD-2022-3859

cvss
8.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

Multiple classes used within Apereo CAS before release 6.1.0-RC5 makes use of apache commons-lang3 RandomStringUtils for token and ID generation which makes them predictable due to RandomStringUtils PRNG's algorithm not being cryptographically strong.

Patch / fix

  • maven org.apereo.cas:cas-server-support-simple-mfa 6.1.0-RC5
  • maven org.apereo.cas:cas-server-support-oidc 6.1.0-RC5
  • maven org.apereo.cas:cas-server-core-services-api 6.1.0-RC5
  • maven org.apereo.cas:cas-server-support-oauth-core-api 6.1.0-RC5
  • maven org.apereo.cas:cas-server-support-shell 6.1.0-RC5
  • maven org.apereo.cas:cas-server-core-services-authentication 6.1.0-RC5

Exploit prediction

1.77% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGAPEREOCAS-467406 referenced PoC, tagged "exploit" by a source, unverified
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGAPEREOCAS-467402 referenced PoC, tagged "exploit" by a source, unverified
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGAPEREOCAS-467404 referenced PoC, tagged "exploit" by a source, unverified
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGAPEREOCAS-468869 referenced PoC, tagged "exploit" by a source, unverified
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGAPEREOCAS-468868 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD 2.0 5.5 AV:N/AC:L/Au:S/C:P/I:P/A:N
GitHub 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
maven org.apereo.cas:cas-server-support-simple-mfa
<6.1.0-RC5
6.1.0-RC5
maven org.apereo.cas:cas-server-support-oidc
<6.1.0-RC5
6.1.0-RC5
maven org.apereo.cas:cas-server-core-services-api
<6.1.0-RC5
6.1.0-RC5
maven org.apereo.cas:cas-server-support-oauth-core-api
<6.1.0-RC5
6.1.0-RC5
maven org.apereo.cas:cas-server-support-shell
<6.1.0-RC5
6.1.0-RC5
maven org.apereo.cas:cas-server-core-services-authentication
<6.1.0-RC5
6.1.0-RC5

Affected products

  • n/a Apereo CAS

Classification

Weakness
  • CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
  • CWE-330 Use of Insufficiently Random Values

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.