CVE-2026-2902Public exploitNetwork attack vector

Unauthenticated stored XSS via predictable rewrite placeholders

Published Apr 29, 2026 · Updated Apr 29, 2026

Stored XSS in WP Meteor Website Speed Optimization Addon 3.4.16 and earlier allows remote attackers to inject scripts through comments. frontend_rewrite treats attacker-controlled WPMETEOR[N]WPMETEOR text as an internal placeholder and substitutes unescaped replacement content. The attack requires a user to load an injected page, where the stored script executes in that user's browser with the site's origin.

CVSS severity6.1
Medium
EPSS probability0.21%
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 WP Meteor Website Speed Optimization Addon 3.4.16 and earlier allows remote attackers to inject scripts through comments. frontend_rewrite treats attacker-controlled WPMETEOR[N]WPMETEOR text as an internal placeholder and substitutes unescaped replacement content. The attack requires a user to load an injected page, where the stored script executes in that user's browser with the site's origin.

The record

CVE
CVE-2026-2902
Published
Apr 29, 2026
Updated
Apr 29, 2026
Vendor
Aleksandr Guidrevitch
Product
WP Meteor Website Speed Optimization Addon
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 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=0 <=3.4.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Aleksandr Guidrevitch · WP Meteor Website Speed Optimization Addonversion=0 <=3.4.16

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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