CVE-2022-36537
HighExploitedPublic exploitZK Framework vulnerable to malicious POST
Published Aug 27, 2022 · Updated Aug 12, 2026 · Also known as GHSA-6278-2q4m-cmf3
Key Facts
Patch immediately- CVE-2022-36537 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Zk Framework (Zkoss), org.zkoss.zk:zk (maven).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 14, 2023 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 95% probability of exploitation in the next 30 days.
- Fixed versions are available, including org.zkoss.zk:zk 8.6.4.2, org.zkoss.zk:zk 9.0.1.3, org.zkoss.zk:zk 9.5.1.4.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
95%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2022-36537 brief as a PDF
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Feb 27, 2023 | Mar 20, 2023 | Known |
| Industry KEV feed | Feb 14, 2023 | Mar 20, 2023 | Known |
| CIRCL KEV | Feb 27, 2023 | Mar 20, 2023 | Known |
| ENISA EUVD | Feb 27, 2023 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Zk FrameworkZkoss | See advisory | 8.6.4.2 |
| org.zkoss.zk:zkmaven | See advisory | 9.6.2 |
Patched Releases
org.zkoss.zk:zk
8.6.4.2, 9.0.1.3, 9.5.1.4, 9.6.0.2, 9.6.2
Zk Framework
8.6.4.2
Timeline
Publicly disclosed
Aug 27, 2022
Added to Industry KEV feed
Feb 14, 2023
Added to CISA KEV
Feb 27, 2023
Added to CIRCL KEV
Feb 27, 2023
Added to ENISA EUVD
Feb 27, 2023
Last updated
Aug 12, 2026
Weakness Type
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2022/36xxx/CVE-2022-36537.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2022-36537
- advisoryhttps://www.bleepingcomputer.com/news/security/cisa-warns-of-hackers-exploiting-zk-java-framework-rce-flaw/
- patchhttps://tracker.zkoss.org/browse/ZK-5150
FAQ
Common 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.
Affected: Zk Framework (Zkoss); org.zkoss.zk:zk (maven). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 14, 2023 and is known to be used in ransomware campaigns.
Yes. It was added on Feb 27, 2023 with a federal remediation due date of Mar 20, 2023.
Public exploit code is available.
Fixed versions are available, including org.zkoss.zk:zk 8.6.4.2, org.zkoss.zk:zk 9.0.1.3, org.zkoss.zk:zk 9.5.1.4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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