SPIP 2026 RCE wave

ANSSI / CERT-FR publishes CERTFR-2026-AVI-0635 on SPIP < 4.4.15, security-policy bypass in the dominant French public-administration CMS

ANSSI / CERT-FR issued CERTFR-2026-AVI-0635 on 2026-05-22 covering a security-policy bypass vulnerability in SPIP (Système de Publication pour l'Internet) versions prior to 4.4.15; SPIP 4.4.15 was released the same day (SPIP blog, 2026-05-22). The advisory quotes the issue in CERT-FR's standard French: "Une vulnérabilité a été découverte dans SPIP. Elle permet à un attaquant de provoquer un contournement de la politique de sécurité. SPIP versions antérieures à 4.4.15 sont affectées." (in English: a vulnerability allows an attacker to bypass the security policy; versions prior to 4.4.15 are affected). No CVE identifier or CVSS score is attached to the CERT-FR notice yet; no exploitation in the wild has been reported.

The SPIP project blog characterises the underlying issue specifically as an open-redirect vulnerability in the cookie action; the "policy bypass" framing in the CERT-FR advisory is the standard generic catch-all used by ANSSI, not a separate finding. SPIP is the predominant CMS across French public administration (préfectures, ministries, research institutions) and the Francophone government sphere in Belgium, Switzerland (Romandie cantonal and communal sites) and Canada. Open-redirect issues in authenticated cookie paths are typically chained into account-impersonation or token-laundering against OAuth/OpenID-Connect identity providers, so the EU/CH public-sector risk is concrete even without a CVE in the loop yet. SPIP 4.4.15 is the immediate follow-on to the earlier-May 4.4.14 security release. Detection vantage: review SPIP access logs for unexpected redirect-parameter values on the cookie-action endpoint and any outbound 30x responses to attacker-controlled hosts; defenders should also note that Swiss cantonal and communal administrations using SPIP for public portals fall under the 24-hour NCSC.ch reporting obligation for critical-infrastructure operators if a SPIP intrusion is later confirmed.

Why it matters to us: every Romandie cantonal/communal SOC with a SPIP-built portal needs to patch in this cycle; the absence of a CVE makes it easy to overlook on automated patch-track reports.

CERTFR-2026-AVI-0564, SPIP < 4.4.14: multiple RCEs (public and private area)

CERT-FR's advisory CERTFR-2026-AVI-0564 (2026-05-12) covers multiple remote code execution flaws in SPIP, the open-source CMS that powers a substantial share of French ministry, université and francophone Swiss canton web sites (CERT-FR CERTFR-2026-AVI-0564, 2026-05-12; SPIP security bulletin, 2026-05-12). The SPIP bulletin describes two distinct RCE paths in versions prior to 4.4.14: one in the private (authenticated) area, and one in the public (unauthenticated) area "under specific nginx configurations"; the SPIP bulletin notes the bugs are "not covered by the security screen", meaning they bypass SPIP's built-in filter layer. No CVE identifiers are assigned in the vendor bulletin. Fixed in SPIP 4.4.14. No ITW reported. Detection concepts: monitor SPIP ecrire/ and front-end access logs for the SSTI / template-load gadget patterns the bulletin enumerates; on shared-host SPIP estates, audit the nginx reverse-proxy configuration for the unsafe location pattern. Hardening: upgrade to 4.4.14; on internet-facing SPIP, gate ecrire/ to a known admin source set at the reverse proxy.