How severe is CVE-2021-44123?

CVE-2021-44123 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-44123 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44123?

CVE-2021-44123 affects Spip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44123?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-44123 published?

CVE-2021-44123 was published on 2022-01-26 and last updated on 2026-06-17.

CVE-2021-44123

CVE-2021-44123 is a high-severity vulnerability in Spip with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Spip
Published: 2022-01-26
Last modified: 2026-06-17

Description

SPIP 4.0.0 is affected by a remote command execution vulnerability. To exploit the vulnerability, an attacker must craft a malicious picture with a double extension, upload it and then click on it to execute it.

Frequently asked questions

What is CVE-2021-44123?: SPIP 4.0.0 is affected by a remote command execution vulnerability. To exploit the vulnerability, an attacker must craft a malicious picture with a double extension, upload it and then click on it to execute it.
How severe is CVE-2021-44123?: CVE-2021-44123 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-44123 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44123?: CVE-2021-44123 affects Spip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44123?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-44123 published?: CVE-2021-44123 was published on 2022-01-26 and last updated on 2026-06-17.

References

https://git.spip.net/spip/spip/commit/1cf91def15966406ddd0488cf9d1ecd1ae82d47a

Affected products (1)

cpe:2.3:a:spip:spip:4.0.0:*:*:*:*:*:*:*

More vulnerabilities in Spip

CVE-2012-4331 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in SPIP before 1.9.2.o, 2.0.x before 2.0.18, and 2.1.x before 2.1.13 have unknown…
CVE-2008-5812 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in SPIP 1.8 before 1.8.3b, 1.9 before 1.9.2g, and 2.0 before 2.0.2 have unknown…
CVE-2024-8517 — Critical (CVSS 9.8): SPIP before 4.3.2, 4.2.16, and 4.1.18 is vulnerable to a command injection issue. A remote and unauthenticated…
CVE-2023-27372 — Critical (CVSS 9.8): SPIP before 4.2.1 allows Remote Code Execution via form values in the public area because serialization is mishandled.…
CVE-2023-24258 — Critical (CVSS 9.8): SPIP v4.1.5 and earlier was discovered to contain a SQL injection vulnerability via the _oups parameter. This…
CVE-2020-28984 — Critical (CVSS 9.8): prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display,…

All CVEs affecting Spip →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →