Medium severity6.1NVD Advisory· Published Feb 19, 2026· Updated Jun 17, 2026

CVE-2026-26223

Description

SPIP before 4.4.8 allows cross-site scripting (XSS) in the private area via malicious iframe tags. The application does not properly sandbox or escape iframe content in the back-office, allowing an attacker to inject and execute malicious scripts. The fix adds a sandbox attribute to iframe tags in the private area. This vulnerability is not mitigated by the SPIP security screen.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Spip/Spip3 versions
cpe:2.3:a:spip:spip:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:spip:spip:*:*:*:*:*:*:*:*range: >=4.4.0,<4.4.8
- (no CPE)range: <4.4.8
- (no CPE)range: 4.4.0

Patches

Vulnerability mechanics

References

blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-8.htmlnvdRelease NotesVendor Advisory
www.vulncheck.com/advisories/spip-cross-site-scripting-via-iframe-tags-in-private-areanvdThird Party Advisory

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

6.1/ 10

CVSS v45.1

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack vector: Network
Complexity: Low
Privileges: None
User interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Vector

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

Affected

Source repo: git.spip.net/spip/spip

EPSS

Probability of exploitation in the next 30 days.

0.17%

VYPR risk score

Composite of severity, exploitation, and reach.

0.40medium

cvss	0.397
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVE ID

CVE-2026-26223

Credits

AD
Arthur Deloffre (Vozec)
finder
LJ
Louka Jacques-Chevallier (Laluka)
finder