CVE-2026-5826Public exploitNetwork attack vector

Browser script execution via unencoded Category parameter

Published Apr 9, 2026 · Updated Apr 9, 2026

Cross-site scripting in Code Projects Simple IT Discussion Forum 1.0 allows remote attackers to execute scripts through the Category parameter. edit-category.php places the parameter's untrusted value into the generated page without encoding or filtering, so a crafted script runs in a visitor's browser. Exploitation requires a victim to load the affected page; the script can act with that browser session's privileges, including accessing non-HttpOnly session data.

CVSS severity4.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Code Projects Simple IT Discussion Forum 1.0 allows remote attackers to execute scripts through the Category parameter. edit-category.php places the parameter's untrusted value into the generated page without encoding or filtering, so a crafted script runs in a visitor's browser. Exploitation requires a victim to load the affected page; the script can act with that browser session's privileges, including accessing non-HttpOnly session data.

The record

CVE
CVE-2026-5826
Published
Apr 9, 2026
Updated
Apr 9, 2026
Vendor
Tutorials Website
Product
Simple IT Discussion Forum
Classifications
CWE-79, CWE-94, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2026Record 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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tutorials Website · Simple IT Discussion Forumversion=1.0

Published CVSS scores

4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1189Drive-by Compromise

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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