How severe is CVE-2021-24306?

CVE-2021-24306 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-24306 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24306?

CVE-2021-24306 affects Ultimatemember Ultimate Member. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24306?

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

When was CVE-2021-24306 published?

CVE-2021-24306 was published on 2021-05-24 and last updated on 2026-06-17.

CVE-2021-24306

CVE-2021-24306 is a medium-severity vulnerability in Ultimatemember Ultimate Member with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ultimatemember Ultimate Member
Published: 2021-05-24
Last modified: 2026-06-17

Description

The Ultimate Member – User Profile, User Registration, Login & Membership Plugin WordPress plugin before 2.1.20 did not properly sanitise, validate or encode the query string when generating a link to edit user's own profile, leading to an authenticated reflected Cross-Site Scripting issue. Knowledge of the targeted username is required to exploit this, and attackers would then need to make the related logged in user open a malicious link.

Frequently asked questions

What is CVE-2021-24306?: The Ultimate Member – User Profile, User Registration, Login & Membership Plugin WordPress plugin before 2.1.20 did not properly sanitise, validate or encode the query string when generating a link to edit user's own profile, leading to an authenticated reflected Cross-Site Scripting issue. Knowledge of the targeted username is required to exploit this, and attackers would then need to make the related logged in user open a malicious link.
How severe is CVE-2021-24306?: CVE-2021-24306 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-24306 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24306?: CVE-2021-24306 affects Ultimatemember Ultimate Member. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24306?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24306 published?: CVE-2021-24306 was published on 2021-05-24 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/35516555-c50c-486a-886c-df49c9e51e2c

Affected products (1)

cpe:2.3:a:ultimatemember:ultimate_member:*:*:*:*:*:wordpress:*:*

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