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CVE-2021-20517

HIGH
8.8
CVSS Score
Published: June 7, 2021 at 02:05 PM UTC
Updated: June 17, 2026 at 03:33 AM UTC
1 product affected across 1 vendorWebSphere Application Server ND

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Severity
HIGH8.8
Exploit prediction
EPSS 2%

Description

IBM WebSphere Application Server Network Deployment 8.5 and 9.0 could allow a remote authenticated attacker to traverse directories. An attacker could send a specially-crafted URL request containing "dot dot" sequences (/../) to read and delete arbitrary files on the system. IBM X-Force ID: 198435.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

WebSphere Application Server ND· IBM
95%
8.5.0.0 ≤ v < 8.5.5.209.0.0.0 ≤ v < 9.0.5.88.59.0
Affected range stops below 8.5.5.20, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.5.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

VDB Entryx_refsource_XFVendor Advisory
Source: [email protected]
https://exchange.xforce.ibmcloud.com/vulnerabilities/198435
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://www.ibm.com/support/pages/node/6456955

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-22

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