# ZK Framework AuUploader: Unspecified (CVE-2022-36537) · pwn.watch

> ZK Framework AuUploader servlets contain an unspecified vulnerability that could allow an attacker to retrieve the content of a file located in the web context. The ZK Framework is an open-source Java framework. This vulnerability can impact multiple products, including but not limited to ConnectWise R1Soft Server Backup Manager. Added to CISA KEV on 2023-02-27. CISA lists known use in ransomware campaigns.

Page: https://pwn.watch/i/zk-framework-auuploader-cve-2022-36537 · generated 2026-10-23T03:54:42.456Z

## Status
- Severity: high · status: closed · patch: patched
- Product: ZK Framework AuUploader
- Started: 2023-02-27 · closed: 2023-02-27
- CVEs: CVE-2022-36537
- Affected: See vendor advisory / CISA notes (versions not always listed in KEV feed)
- Fixed in: See vendor advisory linked in sources

## Follow this incident
- RSS (one item per update): https://pwn.watch/i/zk-framework-auuploader-cve-2022-36537/feed.xml
- JSON Feed: https://pwn.watch/i/zk-framework-auuploader-cve-2022-36537/feed.json
- Full data (timeline, sources, posts, agentBrief): https://pwn.watch/i/zk-framework-auuploader-cve-2022-36537.json
- This file: https://pwn.watch/i/zk-framework-auuploader-cve-2022-36537/llms.txt

## Updates (newest first)
- 2023-02-27: CISA added CVE-2022-36537 to the KEV catalog (due 2023-03-20).

## Fix brief
# Security brief: ZK Framework AuUploader: Unspecified (CVE-2022-36537)

Source: https://pwn.watch/i/zk-framework-auuploader-cve-2022-36537 · status: closed (closed Feb 27, 2023) · severity: high · updated Feb 27, 2023

## Patch status
**PATCHED: fixed releases exist. Upgrade to a fixed version.**

## What it is
ZK Framework AuUploader servlets contain an unspecified vulnerability that could allow an attacker to retrieve the content of a file located in the web context. The ZK Framework is an open-source Java framework. This vulnerability can impact multiple products, including but not limited to ConnectWise R1Soft Server Backup Manager. Added to CISA KEV on 2023-02-27. CISA lists known use in ransomware campaigns.

Severity detail: CVSS 7.5 (NVD), actively exploited (CISA KEV), known ransomware use

- Product: ZK Framework AuUploader
- CVE / advisory ids: CVE-2022-36537

## Affected versions
- See vendor advisory / CISA notes (versions not always listed in KEV feed)

## Check whether you're affected
No generic command applies (the product is a hosted service, appliance or desktop app). Check the installed version in its admin UI / About screen and compare with the versions above.

## Fix
Upgrade to one of these fixed versions (or later on the same branch):
- See vendor advisory linked in sources

After upgrading, re-run the checks above and redeploy/restart the affected services.

## Latest updates
- Feb 27, 2023: CISA added CVE-2022-36537 to the KEV catalog (due 2023-03-20).

## Advisories
- [Vendor advisory: ZK Framework AuUploader](https://tracker.zkoss.org/browse/ZK-5150) (ZK Framework)
- [NVD: CVE-2022-36537](https://nvd.nist.gov/vuln/detail/CVE-2022-36537) (NVD)
- [CISA Known Exploited Vulnerabilities Catalog](https://www.cisa.gov/known-exploited-vulnerabilities-catalog) (CISA)

## Caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).

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Machine-readable: https://pwn.watch/i/zk-framework-auuploader-cve-2022-36537.json · all incidents: https://pwn.watch/incidents.json. Verify against the vendor advisory before changing production systems.