CVE-2022-50993
High PUBLISHEDWeaver E-office < 10.0_20221201 Unauthenticated Arbitrary File Read via XmlRpcServlet
Not yet in CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
Weaver (Fanwei) E-office versions prior to 10.0_20221201 contain an unauthenticated arbitrary file upload vulnerability in the OfficeServer.php endpoint that allows remote attackers to upload malicious files by sending multipart POST requests with arbitrary filenames and disguised content types. Attackers can upload PHP webshells to the Document directory and execute them via HTTP GET requests to achieve remote code execution as the web server user. Exploitation evidence was first observed by the Shadowserver Foundation on 2022-10-10 (UTC).
- CVE Published
- Apr 30, 2026
- Exploitation Reported
- Apr 30, 2026
- CVSS
- 9.3 Critical
- EPSS
- —
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| Weaver Network Co., Ltd. |
E-office
|
0 to < 10.0_20221201 |
Affected |
CVE References
- Patch — service.e-office.cn service.e-office.cn · Patch https://service.e-office.cn/knowledge/detail/5
- Third-Party Advisory — vulncheck.com vulncheck.com · Third-Party Advisory https://www.vulncheck.com/advisories/weaver-e-office-10-0-20221201-un...
- Exploit — cn-sec.com cn-sec.com · Exploit https://cn-sec.com/archives/1453025.html
- Exploit — bbs.chaitin.cn bbs.chaitin.cn · Exploit https://bbs.chaitin.cn/topic/37
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| The Shadowserver First | 2026-04-30 16:08 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2026-04-30 16:08:46 UTC · The Shadowserver
Weaknesses (CWE)
-
Unrestricted Upload of File with Dangerous Type
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
16:08 UTC 3 months ago16:08 UTC · 3 months ago
CVE published
Vulnerability disclosed publicly
-
16:08 UTC 3 months ago16:08 UTC · 3 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
18:22 UTC 3 months ago18:22 UTC · 3 months ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2022-50993
{
"cve_id": "CVE-2022-50993",
"title": "Weaver E-office < 10.0_20221201 Unauthenticated Arbitrary File Read via XmlRp...",
"affected_vendor": "Weaver Network Co., Ltd.",
"affected_product": "E-office",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "High",
"cvss_score": 9.3,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}