CVE-2023-26091Network attack vector

Browser script execution via unencoded form answers

Published Feb 26, 2023 · Updated Mar 11, 2025

Persisted XSS in TYPO3 Forms Export before 3.1.2 and 4.0.0 through 4.0.1 allows remote attackers to run scripts via saved emails. SaveFormToDatabaseFinisher stores form values without HTML encoding, while FormAnswersJsonElement and InMail render the values directly into HTML. Exploitation requires attacker-controlled form data to be saved and a user to view the affected email or backend entry; code then runs in that viewer's browser context.

CVSS severity6.1
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Persisted XSS in TYPO3 Forms Export before 3.1.2 and 4.0.0 through 4.0.1 allows remote attackers to run scripts via saved emails. SaveFormToDatabaseFinisher stores form values without HTML encoding, while FormAnswersJsonElement and InMail render the values directly into HTML. Exploitation requires attacker-controlled form data to be saved and a user to view the affected email or backend entry; code then runs in that viewer's browser context.

The record

CVE
CVE-2023-26091
Published
Feb 26, 2023
Updated
Mar 11, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1059.007Command and Scripting Interpreter: JavaScript

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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