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  4. CVE 2026 120500 an otter wiki before 2262 stored xss via math
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Back to active CVEs
Medium · CVSS 5.3CVE-2026-120500

An Otter Wiki before 2.26.2 Stored XSS via Math Code BlockCVE-2026-120500

Answer in brief

CVE-2026-120500 records a Medium severity (CVSS 5.3) vulnerability in An Otter Wiki before 2.26.2 Stored XSS via Math Code Block. The current sources do not mark it as known exploited. The current feed maps redimp/otterwiki (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 Nov 2, 2026Updated Nov 2, 2026Source checked Nov 2, 2026First seen by HOL Nov 2, 2026Material review Nov 2, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.3. 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 redimp/otterwiki (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
redimp/otterwikigeneric>=2.0.0 <2.26.22.26.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for redimp/otterwiki.
  2. 2Review the reported fix. Update redimp/otterwiki to 2.26.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 2, 2026

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

  2. Source modified

    Nov 2, 2026

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

  3. First seen by HOL

    Nov 2, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

An Otter Wiki before 2.26.2 contains a stored cross-site scripting vulnerability in OtterwikiMdRenderer.block_code that allows attackers who can edit pages, including anonymous users under the default configuration, to inject arbitrary script. Attackers can place HTML inside a math fenced code block, which is rendered unescaped and executes for every viewer of the page.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • An Otter Wiki 2.20.1 before 2.26.2 Repository File Disclosure via DataTable srcSame redimp/otterwiki package
  • XSS in wrensec-commons CREST framework HTTP binding via _mimeType parameterAlso CWE-79

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Nov 2, 2026
References
3 linked sources
Open source record