How severe is CVE-2022-36537?

CVE-2022-36537 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2022-36537?

CVE-2022-36537 affects the following packages: org.zkoss.zk:zk (Maven), org.zkoss.zk:zk (Maven), org.zkoss.zk:zk (Maven), org.zkoss.zk:zk (Maven), org.zkoss.zk:zk (Maven). Ecosystems affected: Maven.

How do I fix CVE-2022-36537?

Update org.zkoss.zk:zk to version 8.6.4.2 or later. Run your dependency manager's update command and verify no transitive dependencies pin the vulnerable version. Use O3 Security's SCA scanner to confirm the fix is applied across your entire dependency tree.

Is CVE-2022-36537 actively exploited in the wild?

Yes. There are 5 known exploit references for CVE-2022-36537, including 3 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-2022-36537?

CVE-2022-36537 has an EPSS (Exploit Prediction Scoring System) score of 93.9%, placing it in the 100th 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. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2022-36537 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2022-36537 (ZK Framework AuUploader Unspecified Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2023-02-27. CISA required all US federal civilian agencies to remediate this vulnerability by 2023-03-20. The required action was: Apply updates per vendor instructions. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

Is there exploit tooling available for CVE-2022-36537?

A Nuclei detection template exists for CVE-2022-36537, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2022-36537 published, and has it been updated?

CVE-2022-36537 was published on August 26, 2022 and was last updated on April 12, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2023-02-27 — agencies required to remediate by 2023-03-20 · Ransomware

☕ Maven

CVE-2022-36537

HIGH

ZK Framework vulnerable to malicious POST

Also known asGHSA-6278-2q4m-cmf3

Published

Aug 26, 2022

Updated

Apr 12, 2026

Affected

5 pkgs

Patched

5 / 5

Exploits

5 known

EPSS Exploitation Probability

via FIRST.org ↗

93.9%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

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.

Blast Radius

5 pkgs affected

☕org.zkoss.zk:zk☕org.zkoss.zk:zk☕org.zkoss.zk:zk☕org.zkoss.zk:zk☕org.zkoss.zk:zk

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

ZK Framework v9.6.1, 9.6.0.1, 9.5.1.3, 9.0.1.2 and 8.6.4.1 allows attackers to access sensitive information via a crafted POST request sent to the component AuUploader.

Affected Packages

5 total 5 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.zkoss.zk:zk`	all versions	8.6.4.2
☕Maven	`org.zkoss.zk:zk`	≥ 9.0.0.0&&< 9.0.1.3	9.0.1.3
☕Maven	`org.zkoss.zk:zk`	≥ 9.5.0.0&&< 9.5.1.4	9.5.1.4
☕Maven	`org.zkoss.zk:zk`	≥ 9.6.0.0&&< 9.6.0.2	9.6.0.2
☕Maven	`org.zkoss.zk:zk`	≥ 9.6.1&&< 9.6.2	9.6.2

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.

ZK Framework v9.6.1, 9.6.0.1, 9.5.1.3, 9.0.1.2 and 8.6.4.1 allows attack…

github.comGithubDec 2022

ZK Framework v9.6.1, 9.6.0.1, 9.5.1.3, 9.0.1.2 and 8.6.4.1 allows attack…

github.comGithubDec 2022

ZK Framework v9.6.1, 9.6.0.1, 9.5.1.3, 9.0.1.2 and 8.6.4.1 allows attack…

cisa.govCISAFeb 2023

Frequently Asked Questions

ZK Framework v9.6.1, 9.6.0.1, 9.5.1.3, 9.0.1.2 and 8.6.4.1 allows attackers to access sensitive information via a crafted POST request sent to the component AuUploader.

O3 Security · Impact-Aware SCA

Is CVE-2022-36537 in your stack?

O3 detects CVE-2022-36537 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works