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NVD / CVE Program· CNA mitre

CVE-2023-27372: SPIP before 4.2.1 allows Remote Code Execution via form values in the public area because serialization is mishandled.

Noroxi assessment

Priority: This week (action score 69/100)

  • A ready-made attack module is public (Metasploit, Nuclei); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (Exploit-DB, GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 99.6% (FIRST EPSS); higher than 99.9% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: spip (Debian:10) 3.2.4-1+deb10u10; spip (Debian:11) 3.2.11-3+deb11u7; spip (Debian:13) 4.1.8+dfsg-1.

Don’t wait for the next maintenance window. Upgrade to spip (Debian:10) 3.2.4-1+deb10u10; spip (Debian:11) 3.2.11-3+deb11u7; spip (Debian:13) 4.1.8+dfsg-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

SPIP before 4.2.1 allows Remote Code Execution via form values in the public area because serialization is mishandled. The fixed versions are 3.2.18, 4.0.10, 4.1.8, and 4.2.1.

CriticalCVSS 9.8 · v3.1—Weaponized Fix available
Published
Feb 28, 2023
Updated
Jun 17, 2026
EPSS
99.6% · 99th percentile

Report tools

JSON

Action score

69

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
30 / 30 · 99.6%

CISA SSVC decision

Exploitation
proof of concept
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
spipspip
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux11.0
  • spip spipbefore 3.2.18
  • spip spip4.0.0 and later · before 4.0.10
  • spip spip4.1.0 and later · before 4.1.8
  • spip spip4.2.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10spipbefore 3.2.4-1+deb10u103.2.4-1+deb10u10
Debian:11spipbefore 3.2.11-3+deb11u73.2.11-3+deb11u7
Debian:13spipbefore 4.1.8+dfsg-14.1.8+dfsg-1

Same product

spip: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-8517SPIP Bigup Multipart File Upload OS Command Injection
    67This week
  • CVE-2024-7954SPIP porte_plume Plugin Arbitrary PHP Execution
    66This week
  • CVE-2026-77647SPIP before 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026.
    60This week

Published before and after this one in the same product

  • ← EarlierCVE-2022-37155Dec 13, 2022 · RCE in SPIP 3.1.13 through 4.1.2 allows remote authenticated users to execute arbitrary code via the _oups parameter.
    47Plan
  • ← EarlierCVE-2023-24258Feb 27, 2023 · SPIP v4.1.5 and earlier was discovered to contain a SQL injection vulnerability via the _oups parameter.
    39Monitor
  • Later →CVE-2023-52322Jan 4, 2024 · ecrire/public/assembler.php in SPIP before 4.1.13 and 4.2.x before 4.2.7 allows XSS because input from _request() is not restricted to safe
    24Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:spip4.1.8+dfsg-1 · Debian:13Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×1
  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×13

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrywebapps2023-06-20
Metasploit moduleexploit/multi/http/spip_rce_formSPIP form PHP Injectionexploit2023-02-27
Nuclei detection templateNuclei template CVE-2023-27372 —
Proof-of-concept repository on GitHubstars:692023-06-19
Proof-of-concept repository on GitHubstars:92023-06-25
Proof-of-concept repository on GitHubstars:02023-07-01
Proof-of-concept repository on GitHubstars:62023-07-05
Proof-of-concept repository on GitHubstars:22023-07-11
Proof-of-concept repository on GitHubstars:32023-07-31
Proof-of-concept repository on GitHubstars:02023-09-07
Proof-of-concept repository on GitHubstars:02024-08-15
Proof-of-concept repository on GitHubstars:22025-04-28

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Metasploit-2 d
  2. Published
  3. First PoC+110 d
  4. TodayOct 28, 2026+1338 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-502 · Deserialization of Untrusted Data

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.

The bug in code

The whole CWE-502 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

python
payload = sock.recv(65536)job = pickle.loads(payload)

Fixed

python
payload = sock.recv(65536)if not hmac.compare_digest(sign(payload), header_sig):    raise PermissionError("invalid signature")job = JobSchema.validate(json.loads(payload))

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records