CVE-2021-25022Public exploitNetwork attack vector

Administrator-session script execution via unescaped restore parameters

Published Jan 3, 2022 · Updated May 22, 2025

Reflected XSS in TeamUpdraft UpdraftPlus before 1.16.66 allows remote attackers to execute script in an administrator's browser. The restore administration page writes the backup_timestamp and job_id query parameters into its response without sanitizing or escaping them. Exploitation requires a logged-in administrator to follow a site-specific crafted link, bounding the consequence to script execution in that browser context.

CVSS severity6.1
Medium
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in TeamUpdraft UpdraftPlus before 1.16.66 allows remote attackers to execute script in an administrator's browser. The restore administration page writes the backup_timestamp and job_id query parameters into its response without sanitizing or escaping them. Exploitation requires a logged-in administrator to follow a site-specific crafted link, bounding the consequence to script execution in that browser context.

The record

CVE
CVE-2021-25022
Published
Jan 3, 2022
Updated
May 22, 2025
Vendor
TeamUpdraft
Product
UpdraftPlus
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 2022CVE publishedPublication date reported by the CVE source.
  2. May 22, 2025Record 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=1.16.66 <1.16.66

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TeamUpdraft · UpdraftPlusversion=1.16.66 <1.16.66

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

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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