CVE-2026-120500

Medium

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.

SeverityMedium

CVSS6.1

Exploit probability—

ProductRedimp Otterwiki

PublishedNov 2, 2026

First seenNov 4, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

redimp otterwiki2.26.2 or later

Patches

github.com/redimp/otterwiki/commit/b2e91d20ed36c01ce140d18698f9abb90685d481

Vendor advisories

github.com/redimp/otterwiki/releases/tag/v2.26.2

Affected products

Product	Affected versions	Fixed in
redimp otterwiki	2.0.0 ≤ v < 2.26.2	2.26.2

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