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  4. CVE 2026 26351 getsimplecms ce 3322 stored xss via componentsphp
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Back to active CVEs
Medium · CVSS 4.8CVE-2026-26351

GetSimpleCMS-CE < 3.3.22 Stored XSS via components.phpCVE-2026-26351

Answer in brief

CVE-2026-26351 records a Medium severity (CVSS 4.8) vulnerability in GetSimpleCMS-CE < 3.3.22 Stored XSS via components.php. The current sources do not mark it as known exploited. The current feed maps GetSimpleCMS-CE/GetSimpleCMS-CE (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 24, 2026Updated Nov 8, 2026Source checked Nov 8, 2026First seen by HOL Nov 8, 2026Material review Nov 8, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 4.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 4.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps GetSimpleCMS-CE/GetSimpleCMS-CE (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
GetSimpleCMS-CE/GetSimpleCMS-CEgeneric3.3.16Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for GetSimpleCMS-CE/GetSimpleCMS-CE.
  2. 2Review the reported fix. Source-reported solution: Version 3.3.22 was confirmed to not be vulnerable

Evidence timeline and material changes

  1. Published upstream

    Feb 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 8, 2026

Sources and claim methodology

  • Source referencegetsimple-ce.ovh
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

GetSimpleCMS Community Edition (CE) versions prior to 3.3.22 (3.3.16 tested) contains a stored cross-site scripting (XSS) vulnerability in the Theme to Components functionality within components.php. User-supplied input provided to the "slug" field of a component is stored without proper output encoding. While other fields are sanitized using safe_slash_html(), the slug parameter is written to XML and later rendered in the administrative interface without sanitation, resulting in persistent execution of arbitrary JavaScript. An authenticated administrator can inject malicious script content that executes whenever the affected Components page is viewed by any authenticated user, enabling session hijacking, unauthorized administrative actions, and persistent compromise of the CMS administrative interface.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • OpenEMR before 8.3.0 Stored XSS via CCDA/CCD Preview XSLT AttributesAlso CWE-79
  • OpenEMR before 8.3.0 Stored XSS via Eye Exam Document NotesAlso CWE-79
  • OpenEMR before 8.3.0 Stored XSS via CAMOS Rx Print ViewAlso CWE-79
  • MRBS before 1.12.3 Reflected XSS via error parameter of view_entry.phpAlso CWE-79
  • SunEditor before 3.4.0 Stored XSS via FileUpload Plugin FilenameAlso CWE-79
  • SunEditor before 3.4.0 Stored XSS via Link Modal Bookmark ListAlso CWE-79

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Nov 8, 2026
References
4 linked sources
Open source record