How severe is CVE-2019-10754?

CVE-2019-10754 has a CVSS score of 8.1/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2019-10754?

CVE-2019-10754 affects the following packages: org.apereo.cas:cas-server-support-simple-mfa (Maven), org.apereo.cas:cas-server-support-oidc (Maven), org.apereo.cas:cas-server-core-services-api (Maven), org.apereo.cas:cas-server-support-oauth-core-api (Maven), org.apereo.cas:cas-server-support-shell (Maven), org.apereo.cas:cas-server-core-services-authentication (Maven). Ecosystems affected: Maven.

How do I fix CVE-2019-10754?

Update org.apereo.cas:cas-server-support-simple-mfa to 6.1.0-RC5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-10754 is resolved across your whole dependency graph.

How do I detect CVE-2019-10754 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apereo.cas:cas-server-support-simple-mfa, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2019-10754 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2019-10754?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2019-10754 can be triaged on real exposure rather than presence alone.

Is CVE-2019-10754 actively exploited in the wild?

Yes. There are 5 known exploit references for CVE-2019-10754, including 5 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2019-10754?

CVE-2019-10754 has an EPSS (Exploit Prediction Scoring System) score of 1.8%, placing it in the 77th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2019-10754?

CVE-2019-10754 is classified as CWE-338 (CWE-338). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2019-10754 published, and has it been updated?

CVE-2019-10754 was published on September 23, 2019 and was last updated on August 27, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

HIGH severity

CVE-2019-10754 — cas-server-support-simple…

HIGHFix: apereo/cas@40bf278

CVE-2019-10754 is a high-severity (CVSS 8.1) CWE-338 vulnerability in org.apereo.cas:cas-server-support-simple-mfa. 5 public exploit references exist, so weaponization risk is real. A fix is available for org.apereo.cas:cas-server-support-simple-mfa — see the affected versions and patch details below.

Use of Insufficiently Random Values in Apereo CAS

Also known asGHSA-g24w-373r-5pxg

Published

Sep 23, 2019

Updated

Aug 27, 2026

Affected

6 pkgs

Patched

6 / 6

Exploits

5 known

Exploitation data as of Sep 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.8%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs77th percentile — riskier than 77% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

How urgent is this, really

CVE-2019-10754 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.

Where this sits among everything scored

Of 378,156 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.

Real-World Exposure

6 pkgs affected

☕org.apereo.cas:cas-server-support-simple-mfa☕org.apereo.cas:cas-server-support-oidc☕org.apereo.cas:cas-server-core-services-api☕org.apereo.cas:cas-server-support-oauth-core-api☕org.apereo.cas:cas-server-support-shell☕org.apereo.cas:cas-server-core-services-authentication

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

6 total 6 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apereo.cas:cas-server-support-simple-mfa`	all versions	6.1.0-RC5`org.apereo.cas:cas-server-support-simple-mfa:6.1.0-RC5`
☕Maven	`org.apereo.cas:cas-server-support-oidc`	all versions	6.1.0-RC5`org.apereo.cas:cas-server-support-oidc:6.1.0-RC5`
☕Maven	`org.apereo.cas:cas-server-core-services-api`	all versions	6.1.0-RC5`org.apereo.cas:cas-server-core-services-api:6.1.0-RC5`
☕Maven	`org.apereo.cas:cas-server-support-oauth-core-api`	all versions	6.1.0-RC5`org.apereo.cas:cas-server-support-oauth-core-api:6.1.0-RC5`
☕Maven	`org.apereo.cas:cas-server-support-shell`	all versions	6.1.0-RC5`org.apereo.cas:cas-server-support-shell:6.1.0-RC5`
☕Maven	`org.apereo.cas:cas-server-core-services-authentication`	all versions	6.1.0-RC5`org.apereo.cas:cas-server-core-services-authentication:6.1.0-RC5`

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.