by Kastro
Paper/Archive/CVE-2026-27475

CVE-2026-27475

SPIP SPIP — SPIP < 4.4.9 Insecure Deserialization

EPSS 0.9%CVSS 9.2
critical.is priorityof 100
40
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 60.0.600 × 2012.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

SPIP before 4.4.9 allows Insecure Deserialization in the public area through the table_valeur filter and the DATA iterator, which accept serialized data. An attacker who can place malicious serialized content (a pre-condition requiring prior access or another vulnerability) can trigger arbitrary object instantiation and potentially achieve code execution. The use of serialized data in these components has been deprecated and will be removed in SPIP 5. This vulnerability is not mitigated by the SPIP security screen.

Affected

ProductAffectedFixed inSource
SPIP4.4.0 – < 4.4.94.4.9CNA

Scores by source

VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheck (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchblog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.htmlrefgit.spip.net/spip/spipwriteupvulncheck.com/advisories/spip-insecure-deserialization