CVE-2020-28984

Improper Input Validation in SPIP

9.8 CriticalFix available

prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display, display_navigation, display_outils, imessage, and spip_ecran parameters.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

2.19%Up 1.2 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display, display_navigation, display_outils, imessage, and spip_ecran parameters.

Record: CVE-2020-28984
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated: 2026-11-02

CVE List No score

prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display, display_navigation, display_outils, imessage, and spip_ecran parameters.

Record: CVE-2020-28984
Updated: 2026-11-02

EUVDEUVD-2020-21367 No score

prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display, display_navigation, display_outils, imessage, and spip_ecran parameters.

Record: EUVD-2020-21367
Updated: 2026-11-03

GitHub AdvisoriesGHSA-5w2r-g8c8-f3m3 9.8

Improper Input Validation in SPIP

prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display, display_navigation, display_outils, imessage, and spip_ecran parameters.

Record: GHSA-5w2r-g8c8-f3m3
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-20
Updated: 2026-11-02

OSV 9.8

prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display, display_navigation, display_outils, imessage, and spip_ecran parameters.

Record: CVE-2020-28984
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-28984 9.8

prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display, display_navigation, display_outils, imessage, and spip_ecran parameters.

Record: DEBIAN-CVE-2020-28984
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-28984 9.8

prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display, display_navigation, display_outils, imessage, and spip_ecran parameters.

Record: UBUNTU-CVE-2020-28984
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUSN-5482-1 No score

spip vulnerabilities

It was discovered that SPIP incorrectly validated inputs. An authenticated attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2020-28984)

Charles Fol and Théo Gordyjan discovered that SPIP is vulnerable to Cross Site Scripting (XSS). If a user were tricked into browsing a malicious SVG file, an attacker could possibly exploit this issue to execute arbitrary code. This issue was only fixed in Ubuntu 21.10. (CVE-2021-44118, CVE-2021-44120, CVE-2021-44122, CVE-2021-44123)

It was discovered that SPIP incorrectly handled certain forms. A remote authenticated editor could possibly use this issue to execute arbitrary code, and a remote unauthenticated attacker could possibly use this issue to obtain sensitive information. (CVE-2022-26846, CVE-2022-26847)

Record: USN-5482-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`spip` Debian:13	before 3.2.8-1	3.2.8-1
`spip` Debian:14	before 3.2.8-1	3.2.8-1
`spip` Debian:9	before 3.1.4-4~deb9u4, plus listed versions 3.1.4-23.1.4-33.1.4-3~deb9u13.1.4-4~deb9u13.1.4-4~deb9u23.1.4-4~deb9u3	3.1.4-4~deb9u4
`spip` Debian:10	before 3.2.4-1+deb10u3, plus listed versions 3.2.4-13.2.4-1+deb10u13.2.4-1+deb10u2	3.2.4-1+deb10u3
`spip` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 3.0.20-13.0.21-13.0.21-1ubuntu13.0.21-1ubuntu1+esm1	None known
`spip` Ubuntu:18.04:LTS	before 3.1.4-4~deb9u5build0.18.04.1, plus listed versions 3.1.4-33.1.4-4~deb9u3build0.18.04.1	3.1.4-4~deb9u5build0.18.04.1
`spip` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 3.2.4-13.2.5-13.2.7-13.2.7-1ubuntu0.13.2.7-1ubuntu0.1+esm2	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-28984 is a critical vulnerability (CVSS 9.8) in Spip, published November 23, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.19%, the 82nd percentile. Fixed in spip 3.2.8-1.

References

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