CVE-2022-50958Public exploitNetwork attack vector

Browser script execution via reflected post_id

Published May 10, 2026 · Updated May 10, 2026

Reflected XSS in Automattic Jetpack 9.1 allows remote attackers to execute JavaScript in a victim browser through a crafted URL. The grunion-form-view.php endpoint inserts the untrusted post_id parameter into its HTML response without neutralizing script markup. No authentication is required, but a victim must open the crafted URL; successful exploitation runs attacker-controlled script in that site's browser context.

CVSS severity5.1
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

Reflected XSS in Automattic Jetpack 9.1 allows remote attackers to execute JavaScript in a victim browser through a crafted URL. The grunion-form-view.php endpoint inserts the untrusted post_id parameter into its HTML response without neutralizing script markup. No authentication is required, but a victim must open the crafted URL; successful exploitation runs attacker-controlled script in that site's browser context.

The record

CVE
CVE-2022-50958
Published
May 10, 2026
Updated
May 10, 2026
Vendor
WooCommerce
Product
Jetpack
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 10, 2026CVE publishedPublication date reported by the CVE source.
  2. May 10, 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=9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WooCommerce · Jetpackversion=9.1

Published CVSS scores

6.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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
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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