CVE-2021-24817
CVE-2021-24817 is a medium-severity vulnerability in Ultimate Nofollow Project Ultimate Nofollow 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: Ultimate Nofollow Project Ultimate Nofollow
- Published:
- Last modified:
Description
The Ultimate NoFollow WordPress plugin through 1.4.8 does not sanitise and escape the href attribute of its shortcodes, allowing users with a role as low as contributor to perform Cross-Site Scripting attacks
Frequently asked questions
- What is CVE-2021-24817?
- The Ultimate NoFollow WordPress plugin through 1.4.8 does not sanitise and escape the href attribute of its shortcodes, allowing users with a role as low as contributor to perform Cross-Site Scripting attacks
- How severe is CVE-2021-24817?
- CVE-2021-24817 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-2021-24817 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-2021-24817?
- CVE-2021-24817 affects Ultimate Nofollow Project Ultimate Nofollow. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-24817?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-24817 published?
- CVE-2021-24817 was published on 2021-12-13 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:ultimate_nofollow_project:ultimate_nofollow:*:*:*:*:*:wordpress:*:*
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