How severe is CVE-2024-0688?

CVE-2024-0688 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2024-0688 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-0688?

CVE-2024-0688 affects Pubsubhubbub Websub. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-0688?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-0688 have an EU (EUVD) identifier?

Yes. CVE-2024-0688 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-16479.

When was CVE-2024-0688 published?

CVE-2024-0688 was published on 2024-01-25 and last updated on 2026-06-17.

CVE-2024-0688

CVE-2024-0688 is a medium-severity vulnerability in Pubsubhubbub Websub with a CVSS 3.x base score of 4.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-16479
Weakness: CWE-79
Affected product: Pubsubhubbub Websub
Published: 2024-01-25
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2024-0688?: 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.
How severe is CVE-2024-0688?: CVE-2024-0688 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2024-0688 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-0688?: CVE-2024-0688 affects Pubsubhubbub Websub. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-0688?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-0688 have an EU (EUVD) identifier?: Yes. CVE-2024-0688 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-16479.
When was CVE-2024-0688 published?: CVE-2024-0688 was published on 2024-01-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pubsubhubbub:websub:*:*:*:*:*:wordpress:*:*

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