SPIP up to 4.4.8 URL_SYNDIC cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in SPIP up to 4.4.8 and classified as problematic. This impacts an unknown function. This manipulation of the argument URL_SYNDIC causes cross site scripting. This vulnerability appears as CVE-2026-27473. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in SPIP up to 4.4.8. It has been declared as problematic. Affected by this vulnerability is an unknown part. The manipulation of the argument URL_SYNDIC with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

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.

The weakness was presented by Dorian Piette. The advisory is shared at blog.spip.net. This vulnerability is known as CVE-2026-27473 since 02/19/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 299642 (Linux Distros Unpatched Vulnerability : CVE-2026-27473), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.4.9 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (299642). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.4
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 299642
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-27473

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SPIP 4.4.9

Timelineinfo

02/19/2026 Advisory disclosed
02/19/2026 +0 days CVE reserved
02/19/2026 +0 days VulDB entry created
02/21/2026 +2 days VulDB entry last update

Sourcesinfo

Advisory: blog.spip.net
Researcher: Dorian Piette
Status: Confirmed

CVE: CVE-2026-27473 (🔒)
GCVE (CVE): GCVE-0-2026-27473
GCVE (VulDB): GCVE-100-346993

Entryinfo

Created: 02/19/2026 21:56
Updated: 02/21/2026 08:33
Changes: 02/19/2026 21:56 (77), 02/21/2026 08:33 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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