CVE-2025-11436Public exploitNetwork attack vector

Stored XSS via inline uploaded SVG files

Published Oct 8, 2025 · Updated Oct 8, 2025

Stored cross-site scripting in OpnForm 1.9.0 through 1.9.3 allows remote authenticated users to execute script via uploaded SVG files. The submissionFile handler passes the stored path to response()->file, causing the browser to render attacker-controlled SVG instead of forcing a download. Exploitation requires a valid signed file URL and executes script when that URL is opened in a browser.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in OpnForm 1.9.0 through 1.9.3 allows remote authenticated users to execute script via uploaded SVG files. The submissionFile handler passes the stored path to response()->file, causing the browser to render attacker-controlled SVG instead of forcing a download. Exploitation requires a valid signed file URL and executes script when that URL is opened in a browser.

The record

CVE
CVE-2025-11436
Published
Oct 8, 2025
Updated
Oct 8, 2025
Vendor
JhumanJ
Product
OpnForm
Classifications
CWE-284, CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 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=1.9.0
  2. Affected versionversion=1.9.1
  3. Affected versionversion=1.9.2
  4. Affected versionversion=1.9.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JhumanJ · OpnFormversion=1.9.0; version=1.9.1; version=1.9.2; version=1.9.3

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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