CVE-2023-27372Public exploitNetwork attack vector

Unauthenticated code execution via serialized form values

Published Feb 28, 2023 · Updated Mar 11, 2025

Deserialization of untrusted data in SPIP before 4.2.1 allows remote attackers to execute arbitrary code through public form values. The protege_champ() sanitizer uses a pattern that leaves crafted PHP serialized strings intact, allowing an oubli field value to reach SPIP's template evaluation path. The password-reset form requires no authentication, and successful exploitation runs code in the web application's security context.

CVSS severity9.8
Critical
EPSS probability99.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in SPIP before 4.2.1 allows remote attackers to execute arbitrary code through public form values. The protege_champ() sanitizer uses a pattern that leaves crafted PHP serialized strings intact, allowing an oubli field value to reach SPIP's template evaluation path. The password-reset form requires no authentication, and successful exploitation runs code in the web application's security context.

The record

CVE
CVE-2023-27372
Published
Feb 28, 2023
Updated
Mar 11, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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?

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

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
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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