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CVE-2021-24423

UpdraftPlus < 1.16.59 - Admin+ Stored Cross-Site Scripting

MEDIUM
4.8
CVSS Score
Published: January 24, 2022 at 08:00 AM UTC
Updated: June 17, 2026 at 03:40 AM UTC
1 product affected across 1 vendorUpdraftPlus

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.6%

Description

The UpdraftPlus WordPress Backup Plugin WordPress plugin before 1.6.59 does not sanitise its updraft_service settings, allowing high privilege users to set malicious JavaScript payload in it and leading to a Stored Cross-Site Scripting issue

Affected

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

UpdraftPlus· Updraftpluswordpress-plugin
95%
v < 1.16.59v < 1.6.59
Affected range stops below 1.16.59, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.6.59, 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 (2)

x_refsource_MISC
Source: [email protected]
https://m0ze.ru/vulnerability/%5B2021-05-09%5D-%5BWordPress%5D-%5BCWE-79%5D-UpdraftPlus-WordPress-Plugin-v1.16.56.txt
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://wpscan.com/vulnerability/541974d6-2df8-4497-9aee-afd3b9024102

CVSS

4.8MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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