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CVE-2024-0688

WebSub (FKA. PubSubHubbub) <= 3.1.4 - Authenticated (Admin+) Stored Cross-Site Scripting

MEDIUM
4.8
CVSS Score
Published: January 25, 2024 at 01:55 AM UTC
Updated: June 17, 2026 at 06:54 AM UTC
2 products affected across 2 vendorsWebsubWebsub

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

The "WebSub (FKA. PubSubHubbub)" plugin for WordPress is vulnerable to Stored Cross-Site Scripting via plugin settings in all versions up to, and including, 3.1.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Websub· Pubsubhubbubwordpress-plugin
95%
v < 3.2.0
Affected range stops below 3.2.0, so it looks safe — our inference, not a vendor statement
Websub· Joshfrazwordpress-plugin
60%
v ≤ 3.1.4

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Patch
Source: [email protected]
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3024228%40pubsubhubbub&new=3024228%40pubsubhubbub&sfp_email=&sfph_mail=
Third Party Advisory
Source: [email protected]
https://www.wordfence.com/threat-intel/vulnerabilities/id/f07b166b-3436-4797-a2df-096ff7c27a09?source=cve

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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