CVE-2020-28473

Web Cache Poisoning

MEDIUM
6.8
CVSS Score
Published: January 18, 2021 at 11:15 AM UTC
Updated: June 17, 2026 at 03:10 AM UTC
2 products affected across 2 vendorsDebian LinuxBottle

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Severity
MEDIUM6.8
Exploit prediction
EPSS 2%

Description

The package bottle from 0 and before 0.12.19 are vulnerable to Web Cache Poisoning by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.

Affected

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

v < 0.12.19
Affected range stops below 0.12.19, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

x_refsource_MISCProductThird Party Advisory
https://github.com/bottlepy/bottle
Mailing Listx_refsource_MLISTThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/01/msg00019.html
x_refsource_MISCExploitThird Party Advisory
https://snyk.io/vuln/SNYK-PYTHON-BOTTLE-1017108

CVSS

6.8MEDIUMsnyk
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-444

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