CVE-2025-2979Public exploitNetwork attack vector

Stored XSS via unsanitized registration username

Published Mar 31, 2025 · Updated Mar 31, 2025

Stored XSS in WCMS 11 Registration allows remote authenticated users to run JavaScript through a crafted username. The setregister action accepts the Username field for a registration record without neutralizing browser-active content, which is later rendered in the administrative User Module. The published proof of concept requires privileged access to submit the record and an administrator to open that module; execution is confined to the administrator's browser context.

CVSS severity4.8
Medium
EPSS probability0.37%
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 WCMS 11 Registration allows remote authenticated users to run JavaScript through a crafted username. The setregister action accepts the Username field for a registration record without neutralizing browser-active content, which is later rendered in the administrative User Module. The published proof of concept requires privileged access to submit the record and an administrator to open that module; execution is confined to the administrator's browser context.

The record

CVE
CVE-2025-2979
Published
Mar 31, 2025
Updated
Mar 31, 2025
Vendor
phpwcms
Product
phpwcms
Classifications
CWE-94, CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 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=11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

phpwcms · phpwcmsversion=11

Published CVSS scores

4.8VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/A:N
2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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