CVE-2026-57349Network attack vector

Script execution via unescaped Feed Viewer headers

Published Jul 2, 2026 · Updated Jul 2, 2026

Reflected XSS in Etruel WPeMatico RSS Feed Fetcher 2.8.17 and earlier allows remote attackers to run script via crafted HTTP headers. The Feed Viewer writes feed-server response headers into its administrative results page without output escaping. Exploitation requires a privileged user to open a crafted Feed Viewer request, after which the script runs in that user's browser and can act with that WordPress session.

CVSS severity7.1
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Etruel WPeMatico RSS Feed Fetcher 2.8.17 and earlier allows remote attackers to run script via crafted HTTP headers. The Feed Viewer writes feed-server response headers into its administrative results page without output escaping. Exploitation requires a privileged user to open a crafted Feed Viewer request, after which the script runs in that user's browser and can act with that WordPress session.

The record

CVE
CVE-2026-57349
Published
Jul 2, 2026
Updated
Jul 2, 2026
Vendor
Etruel Developments LLC
Product
WPeMatico RSS Feed Fetcher
Classifications
CWE-79, CAPEC-591, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 2, 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=n/a <=2.8.17 changes=[{"at":"2.8.18","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Etruel Developments LLC · WPeMatico RSS Feed Fetcherversion=n/a <=2.8.17 changes=[{"at":"2.8.18","status":"unaffected"}]

Published CVSS scores

7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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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