CVE-2024-0688Network attack vector

Administrator-level stored XSS via unescaped plugin settings

Published Jan 25, 2024 · Updated Apr 8, 2026

Stored XSS in joshfraz WebSub 3.1.4 and earlier allows remote authenticated users to inject scripts through plugin settings. The settings path accepts hub values without sufficient input sanitization, then renders the stored values without context-appropriate output escaping. Administrator-level access is required, and injected JavaScript executes in the affected WordPress site's origin when the tainted output is viewed.

CVSS severity4.4
Medium
EPSS probability0.30%
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 joshfraz WebSub 3.1.4 and earlier allows remote authenticated users to inject scripts through plugin settings. The settings path accepts hub values without sufficient input sanitization, then renders the stored values without context-appropriate output escaping. Administrator-level access is required, and injected JavaScript executes in the affected WordPress site's origin when the tainted output is viewed.

The record

CVE
CVE-2024-0688
Published
Jan 25, 2024
Updated
Apr 8, 2026
Vendor
joshfraz
Product
WebSub (FKA. PubSubHubbub)
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=3.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

joshfraz · WebSub (FKA. PubSubHubbub)version=0 <=3.1.4

Published CVSS scores

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/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.

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
Privilegesadmin
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.

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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