How severe is CVE-2021-24508?

CVE-2021-24508 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-24508 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24508?

CVE-2021-24508 affects Smashballoon Smash Balloon Social Post Feed. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24508?

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

When was CVE-2021-24508 published?

CVE-2021-24508 was published on 2021-09-13 and last updated on 2026-06-17.

CVE-2021-24508

CVE-2021-24508 is a medium-severity vulnerability in Smashballoon Smash Balloon Social Post Feed with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Smashballoon Smash Balloon Social Post Feed
Published: 2021-09-13
Last modified: 2026-06-17

Description

The Smash Balloon Social Post Feed WordPress plugin before 2.19.2 does not sanitise or escape the feedID POST parameter in its feed_locator AJAX action (available to both authenticated and unauthenticated users) before outputting a truncated version of it in the admin dashboard, leading to an unauthenticated Stored Cross-Site Scripting issue which will be executed in the context of a logged in administrator.

Frequently asked questions

What is CVE-2021-24508?: The Smash Balloon Social Post Feed WordPress plugin before 2.19.2 does not sanitise or escape the feedID POST parameter in its feed_locator AJAX action (available to both authenticated and unauthenticated users) before outputting a truncated version of it in the admin dashboard, leading to an unauthenticated Stored Cross-Site Scripting issue which will be executed in the context of a logged in administrator.
How severe is CVE-2021-24508?: CVE-2021-24508 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-24508 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24508?: CVE-2021-24508 affects Smashballoon Smash Balloon Social Post Feed. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24508?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24508 published?: CVE-2021-24508 was published on 2021-09-13 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/2b543740-d4b0-49b5-a021-454a3a72162f

Affected products (1)

cpe:2.3:a:smashballoon:smash_balloon_social_post_feed:*:*:*:*:*:wordpress:*:*

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