CVE-2022-1063Public exploitNetwork attack vector

Stored XSS via unescaped message subjects

Published Apr 18, 2022 · Updated Aug 2, 2024

Stored XSS in Thank Me Later 3.3.4 and earlier allows remote authenticated users with administrator privileges to execute script. The message editor stores the Message Subject field without sanitization, and the Messages list renders it without output escaping. An administrator must add or edit a crafted subject and another user must view the plugin's Messages list, where the script runs in that viewer's browser even when unfiltered_html is disabled.

CVSS severity4.8
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Thank Me Later 3.3.4 and earlier allows remote authenticated users with administrator privileges to execute script. The message editor stores the Message Subject field without sanitization, and the Messages list renders it without output escaping. An administrator must add or edit a crafted subject and another user must view the plugin's Messages list, where the script runs in that viewer's browser even when unfiltered_html is disabled.

The record

CVE
CVE-2022-1063
Published
Apr 18, 2022
Updated
Aug 2, 2024
Vendor
Brendon Boshell
Product
Thank Me Later
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=3.3.4 <=3.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Brendon Boshell · Thank Me Laterversion=3.3.4 <=3.3.4

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

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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