CVE-2026-29933Public exploitNetwork attack vector

Reflected XSS via unvalidated Referer return link

Published Mar 26, 2026 · Updated Mar 26, 2026

Reflected XSS in YZMCMS 7.4 allows remote attackers to execute JavaScript in a user's browser through a crafted Referer header. The /index/login.html flow uses the unvalidated Referer value as a return-page target, causing a javascript URL to execute when the return control is selected. No authentication is required, but user interaction with the affected flow and return control is required; execution remains within that user's browser context.

CVSS severity6.1
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in YZMCMS 7.4 allows remote attackers to execute JavaScript in a user's browser through a crafted Referer header. The /index/login.html flow uses the unvalidated Referer value as a return-page target, causing a javascript URL to execute when the return control is selected. No authentication is required, but user interaction with the affected flow and return control is required; execution remains within that user's browser context.

The record

CVE
CVE-2026-29933
Published
Mar 26, 2026
Updated
Mar 26, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 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?

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

6.1CISA-ADPCVSS: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.

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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')
T1203Exploitation for Client Execution

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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