CVE-2026-2430Network attack vector

Contributor-level stored XSS via lazy-load attribute rewriting

Published Mar 20, 2026 · Updated Mar 20, 2026

Stored XSS in Autoptimize 3.1.14 and earlier allows remote authenticated users to inject scripts through lazy-loaded image attributes. The add_lazyload function uses an overly permissive regular expression that matches whitespace-prefixed src= text without restricting the match to an actual image attribute. Contributor-level access is required to store a crafted image tag, and the injected script executes when another user views the affected page.

CVSS severity6.4
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Autoptimize 3.1.14 and earlier allows remote authenticated users to inject scripts through lazy-loaded image attributes. The add_lazyload function uses an overly permissive regular expression that matches whitespace-prefixed src= text without restricting the match to an actual image attribute. Contributor-level access is required to store a crafted image tag, and the injected script executes when another user views the affected page.

The record

CVE
CVE-2026-2430
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
Optimizing Matters
Product
Autoptimize
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=3.1.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Optimizing Matters · Autoptimizeversion=* <=3.1.14

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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