CVE-2026-118784
WPSpeed <= 2.6.10 - Authenticated (Subscriber+) Stored Cross-Site Scripting via User Nickname/Display Name
Description
The WPSpeed plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.6.10 This is due to a combination of two issues in the LightImages HTML optimizer: (1) Dispatcher::runOptimize() decides whether the current request is the site's home page by comparing only the URL path from REQUEST_URI against the path of the home URL, so on a plain-permalinks install the author archive URL /?author=<ID> is treated as the home page and the LightImages optimizer runs on it; and (2) LightImages::optimize() calls html_entity_decode() across the entire serialized DOMDocument output under the default-enabled img_processing_entity_decode setting, converting any entity-encoded markup present as plain text in the page (including WordPress's rendered author title) into live HTML. This makes it possible for authenticated attackers, with Subscriber-level access and above, to store entity-encoded markup in their own nickname/display_name through the normal profile endpoint and have that markup rehydrated into executing script when any logged-out visitor loads their author archive.
INFO
Published Date :
Nov. 7, 2026, 9:25 a.m.
Last Modified :
Nov. 7, 2026, 9:25 a.m.
Remotely Exploit :
Yes !
Source :
Wordfence
Affected Products
The following products are affected by CVE-2026-118784
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update the WPSpeed plugin to the latest version.
- Apply vendor patches for LightImages HTML optimizer.
- Remove any stored entity-encoded markup from user profiles.
- Disable img_processing_entity_decode if updating is not possible.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-118784 vulnerability anywhere in the article.