CVE-2023-33971Public exploitNetwork attack vector

Stored XSS via unescaped full-form rendering

Published May 31, 2023 · Updated Jan 9, 2025

Stored XSS in pluginsGLPI Formcreator 2.13.5 and earlier allows remote attackers to run JavaScript in an administrator's browser. The FULLFORM target-description placeholder renders submitted text-field content without neutralizing HTML and script-capable attributes. An administrator must configure that placeholder, an attacker must submit the crafted form, and an administrator or technician must open the resulting ticket.

CVSS severity6.1
Medium
EPSS probability0.55%
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 pluginsGLPI Formcreator 2.13.5 and earlier allows remote attackers to run JavaScript in an administrator's browser. The FULLFORM target-description placeholder renders submitted text-field content without neutralizing HTML and script-capable attributes. An administrator must configure that placeholder, an attacker must submit the crafted form, and an administrator or technician must open the resulting ticket.

The record

CVE
CVE-2023-33971
Published
May 31, 2023
Updated
Jan 9, 2025
Vendor
pluginsGLPI
Product
Formcreator
Classifications
CWE-80, CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 2.13.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pluginsGLPI · Formcreatorversion=<= 2.13.5

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.5GitHub repository security advisoryCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
6.1GitHub CNACVSS: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.

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-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
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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