CVE-2020-5398Network attack vector

Malicious downloads via unescaped filename quotes

Published Jan 16, 2020 · Updated Sep 16, 2024

Reflected file download in Spring Framework allows remote attackers to induce malicious downloads through crafted response filenames. ContentDisposition.Builder inserts an unescaped quotation mark from a user-controlled filename into the quoted Content-Disposition parameter, allowing the value to break header syntax. Exposure requires an application to use an affected filename overload without sanitization and a victim to download and open attacker-injected response content.

CVSS severity7.5
High
EPSS probability88.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected file download in Spring Framework allows remote attackers to induce malicious downloads through crafted response filenames. ContentDisposition.Builder inserts an unescaped quotation mark from a user-controlled filename into the quoted Content-Disposition parameter, allowing the value to break header syntax. Exposure requires an application to use an affected filename overload without sanitization and a victim to download and open attacker-injected response content.

The record

CVE
CVE-2020-5398
Published
Jan 16, 2020
Updated
Sep 16, 2024
Vendor
Spring
Product
Spring Framework
Classifications
CWE-79, CWE-494, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0 <v5.0.16.RELEASE
  2. Affected versionversion=5.1 <v5.1.13.RELEASE
  3. Affected versionversion=5.2 <v5.2.3.RELEASE

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spring · Spring Frameworkversion=5.0 <v5.0.16.RELEASE; version=5.1 <v5.1.13.RELEASE; version=5.2 <v5.2.3.RELEASE

Published CVSS scores

7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
8.0Pivotal Software, Inc.CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
7.6NIST National Vulnerability DatabaseAV:N/AC:H/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-494Download of Code Without Integrity Check
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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