CVE-2022-36537: ZK Framework AuUploader Unspecified Vulnerability

Q: How do I fix CVE-2022-36537?

zk framework: upgrade to 8.6.4.2, 9.0.1.3, 9.5.1.3, 9.6.2. Exact commands for each OS are on this page.

Q: Is CVE-2022-36537 being exploited?

Yes. CVE-2022-36537 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

Q: What does CVE-2022-36537 affect?

CVE-2022-36537 affects zk framework. Severity is high (CVSS 7.5). 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.

Q: How urgent is CVE-2022-36537?

Priority 91/100. High severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Used in ransomware campaigns; Public exploit reference; Remotely exploitable, no login, no user action

Patch now

HIGH 7.5EXPLOITEDREMOTEUPGRADE

CVE-2022-36537 is a high-severity flaw (CVSS 7.5) affecting zk framework, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Exploited in the wild (CISA KEV)
Used in ransomware campaigns
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	95.4% (top 1%)
CISA exploited list	Yes, fix due 2023-03-20, used in ransomware
Published	2022-08-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zkoss

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-08-26 20:15 UTCPublished CVE record published
2023-02-27Exploited Added to the CISA Known Exploited Vulnerabilities list
2023-03-20Deadline CISA due date for US federal agencies to patch
2026-06-17 04:53 UTCUpdated Record last modified

zkoss zk framework UPGRADE

Affected: < 8.6.4.2 · >= 9.0.0 and < 9.0.1.3 · >= 9.5.0 and < 9.5.1.3 · >= 9.6.0 and < 9.6.2

Fixed in: 8.6.4.2, 9.0.1.3, 9.5.1.3, 9.6.2

Safe to downgrade to: a release before 9.0.0

1. Check installed version

apt-cache policy zk-framework || rpm -q zk-framework || zk-framework --version

2. UPGRADE to 8.6.4.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zk-framework

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zk-framework

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.0.0 (Debian / Ubuntu)

apt-cache madison zk-framework sudo apt install zk-framework=<VERSION_BEFORE_9.0.0> sudo apt-mark hold zk-framework

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list zk-framework sudo dnf downgrade zk-framework-<VERSION_BEFORE_9.0.0> sudo dnf versionlock add zk-framework

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Maven · org.zkoss.zk:zk · FIXED · 8.6.4.2 · vulnerable: < 8.6.4.2 · source

Set org.zkoss.zk:zk to 8.6.4.2 or later in pom.xml or build.gradle, then rebuild and redeploy.

Fedora ELN · luksmeta · FIXED · 11-3.eln159 · FEDORA-2026-5176083b78 · source

sudo dnf upgrade --advisory=FEDORA-2026-5176083b78

Fedora 46 · openscad · FIXED · 2021.01-34.fc46 · FEDORA-2026-faf1721128 · source

sudo dnf upgrade --advisory=FEDORA-2026-faf1721128

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: Malwareman007/CVE-2022-36537 (36 stars)
GitHub PoC: agnihackers/CVE-2022-36537-EXPLOIT (9 stars)
GitHub PoC: ethan-repo-lab4b6/CVE-2022-36537 (0 stars)
Write-up: tracker.zkoss.org/browse/ZK-5150
Write-up: www.bleepingcomputer.com/news/security/cisa-warns-of-hackers-exploiting-zk-java-framework-
Nuclei scan template: ZK Framework - Information Disclosure

Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-36537?

zk framework: upgrade to 8.6.4.2, 9.0.1.3, 9.5.1.3, 9.6.2. Exact commands for each OS are on this page.

Is CVE-2022-36537 being exploited?

Yes. CVE-2022-36537 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2022-36537 affect?

CVE-2022-36537 affects zk framework. Severity is high (CVSS 7.5). 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.

How urgent is CVE-2022-36537?

Priority 91/100. High severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Used in ransomware campaigns; Public exploit reference; Remotely exploitable, no login, no user action

References

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