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CVE Record

CVE-2026-26345: SPIP < 4.4.8 Cross-Site Scripting in Public Area

SPIP before 4.4.8 contains a stored cross-site scripting (XSS) vulnerability in the public area triggered in certain edge-case usage patterns. The echapper_html_suspect() function does not adequately sanitize user-controlled content, allowing authenticated users with content-editing privileges (e.g., author-level roles and above) to inject malicious scripts. The injected payload may be rendered across multiple pages within the framework and execute in the browser context of other users, including administrators. Successful exploitation can allow attackers to perform actions in the security context of the victim user, including unauthorized modification of application state. This vulnerability is not mitigated by the SPIP security screen.

HighCVSS 8.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

SPIP versions before 4.4.8 have a stored XSS flaw in the public area. A logged-in user with content-editing rights can save content that later runs script in other users’ browsers, including administrators. This can lead to unauthorized actions using the victim’s session.

Executive priority

Prioritize patching public SPIP sites. The flaw requires an editor account, but successful abuse can affect administrators and modify application state. Treat as high priority where contributor accounts are numerous or externally managed.

Technical view

The issue is inadequate sanitization in echapper_html_suspect() for user-controlled content. It is stored XSS, network-reachable, low complexity, requiring low privileges and victim interaction. The CVSS v4.0 score is 8.6. The SPIP security screen is explicitly stated as not mitigating this vulnerability.

Likely exposure

Internet-facing SPIP sites below 4.4.8 are the main concern, especially where author-level or higher accounts can create or edit public content. Exposure depends on enabled content workflows and account trust.

Exploitation context

Sources do not report active exploitation, and the CVE is not listed as KEV in the provided bundle. Exploitation requires an authenticated editor and a victim viewing affected rendered content.

Researcher notes

Evidence identifies stored XSS in SPIP before 4.4.8, with a fix referenced by the vendor advisory. The provided data does not include exploit code, observed exploitation, or detailed affected branch coverage beyond the stated pre-4.4.8 scope.

Mitigation direction

  • Upgrade SPIP to version 4.4.8 or later, per vendor advisory.
  • Do not rely on the SPIP security screen for this issue.
  • Review and reduce content-editing privileges where business workflows allow.
  • Monitor SPIP vendor guidance for any additional remediation details.

Validation and detection

  • Inventory SPIP instances and identify versions below 4.4.8.
  • Confirm whether public content editing is available to author-level users or above.
  • Review recent content changes by lower-trust editor accounts.
  • Verify upgraded instances report SPIP 4.4.8 or later.
Prepared
Confidence
high
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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CVE-2026-26345 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.6 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
8.6CVSS 4.0HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N——Primary CVE score

Vulnerability scoring details

Base CVSS 4.0 score

8.6High
CVSS 4.0 vector shape for CVE-2026-26345Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
SPIPSPIP4.4.0unaffected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.