Security readout for executives and security teams
Plain-English summary
CVE-2026-27474 is a cross-site scripting issue in SPIP before 4.4.9. An attacker could get script to run in a user’s browser in the SPIP private area if that user interacts with malicious content. This can affect confidentiality and integrity, but the published severity is medium, not critical.
Executive priority
Treat as a near-term patching item for SPIP sites, especially administrative workflows. It is not currently supported as actively exploited in the provided sources, but it can undermine trusted private-area sessions and was caused by an incomplete prior fix.
Technical view
The issue complements an incomplete SPIP 4.4.8 fix. The echappe_anti_xss() function was not consistently applied to input, form, button, and anchor tags, allowing script injection through those elements. CVSS 3.1 is 6.1: network exploitable, low complexity, no privileges required, user interaction required, changed scope.
Likely exposure
Organizations running SPIP versions before 4.4.9 are the likely exposed population. Exposure is most relevant where users access the SPIP private area and can be induced to interact with malicious content. The SPIP security screen does not mitigate this vulnerability, according to the provided description.
Exploitation context
The source bundle does not indicate active exploitation, and this CVE is not listed as KEV. Exploitation requires user interaction and targets browser execution in the SPIP private area. Impact is limited to low confidentiality and integrity effects in the CVSS data, with no availability impact stated.
Researcher notes
Key research point: the incomplete 4.4.8 fix did not systematically apply echappe_anti_xss() to input, form, button, and a tags. Public sources provided do not include a CWE, proof-of-concept, or evidence of exploitation. Validate behavior only in authorized test environments.
Mitigation direction
- Upgrade SPIP to 4.4.9 or later following the vendor advisory.
- Do not rely on the SPIP security screen as mitigation.
- Review vendor guidance for any additional hardening or configuration advice.
- Prioritize systems with active SPIP private-area users.
Validation and detection
- Inventory SPIP installations and record exact versions.
- Confirm affected systems are upgraded to 4.4.9 or later.
- Verify the SPIP security screen is not documented as the compensating control.
- Review SPIP release notes and advisory references for environment-specific guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2026-27474 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.htmlCVE reference · vendor-advisory, patch
- https://git.spip.net/spip/spipCVE reference · product
- VulnCheck Advisory: SPIP < 4.4.9 Cross-Site Scripting in Private Area (Incomplete Fix)CVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.