CVE-2025-13159Network attack vector

Unauthenticated stored XSS via unvalidated SVG uploads

Published Nov 21, 2025 · Updated Nov 21, 2025

Stored XSS in Flothemes Flo Forms 1.0.43 and earlier allows remote attackers to run script when an administrator views an uploaded SVG. The unauthenticated flo_form_submit AJAX handler accepts SVG uploads without validating or neutralizing embedded JavaScript content. Exploitation requires an administrator to view the stored SVG in the WordPress admin interface, where script runs in that session and can alter the site.

CVSS severity7.1
High
EPSS probability0.31%
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 Flothemes Flo Forms 1.0.43 and earlier allows remote attackers to run script when an administrator views an uploaded SVG. The unauthenticated flo_form_submit AJAX handler accepts SVG uploads without validating or neutralizing embedded JavaScript content. Exploitation requires an administrator to view the stored SVG in the WordPress admin interface, where script runs in that session and can alter the site.

The record

CVE
CVE-2025-13159
Published
Nov 21, 2025
Updated
Nov 21, 2025
Vendor
Flothemes
Product
Flo Forms
Classifications
CWE-79, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 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=* <=1.0.43

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Flothemes · Flo Formsversion=* <=1.0.43

Published CVSS scores

7.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.002Malicious File

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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