CVE-2026-27473
SPIP < 4.4.9 Stored Cross-Site Scripting via Syndicated Sites
Description
SPIP before 4.4.9 allows Stored Cross-Site Scripting (XSS) via syndicated sites in the private area. The #URL_SYNDIC output is not properly sanitized on the private syndicated site page, allowing an attacker who can set a malicious syndication URL to inject persistent scripts that execute when other administrators view the syndicated site details.
INFO
Published Date :
Feb. 19, 2026, 7:22 p.m.
Last Modified :
Feb. 24, 2026, 7:44 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update SPIP to version 4.4.9 or later.
- Sanitize all user-supplied URL data.
- Implement input validation for syndicated site URLs.
- Review syndication data for malicious content.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-27473.
| URL | Resource |
|---|---|
| https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html | Vendor Advisory Release Notes |
| https://git.spip.net/spip/spip | Product |
| https://www.vulncheck.com/advisories/spip-stored-cross-site-scripting-via-syndicated-sites | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-27473 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-27473
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-27473 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-27473 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 24, 2026
Action Type Old Value New Value Added CWE CWE-79 Added CPE Configuration OR *cpe:2.3:a:spip:spip:*:*:*:*:*:*:*:* versions from (including) 4.4.0 up to (excluding) 4.4.9 Added Reference Type VulnCheck: https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html Types: Release Notes, Vendor Advisory Added Reference Type VulnCheck: https://git.spip.net/spip/spip Types: Product Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/spip-stored-cross-site-scripting-via-syndicated-sites Types: Third Party Advisory -
New CVE Received by [email protected]
Feb. 19, 2026
Action Type Old Value New Value Added Description SPIP before 4.4.9 allows Stored Cross-Site Scripting (XSS) via syndicated sites in the private area. The #URL_SYNDIC output is not properly sanitized on the private syndicated site page, allowing an attacker who can set a malicious syndication URL to inject persistent scripts that execute when other administrators view the syndicated site details. Added CVSS V4.0 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 Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Added Reference https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html Added Reference https://git.spip.net/spip/spip Added Reference https://www.vulncheck.com/advisories/spip-stored-cross-site-scripting-via-syndicated-sites