CVE-2021-24440
CVE-2021-24440 is a medium-severity vulnerability in Fetchdesigns Sign-up Sheets with a CVSS 3.x base score of 4.8. 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 4.8)
- CVSS v2: 3.5
- EPSS exploit prediction: 1% (45th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Fetchdesigns Sign-up Sheets
- Published:
- Last modified:
Description
The Sign-up Sheets WordPress plugin before 1.0.14 did not sanitise or escape some of its fields when creating a new sheet, allowing high privilege users to add JavaScript in them, leading to a Stored Cross-Site Scripting issue. The payloads will be triggered when viewing the 'All Sheets' page in the admin dashboard
Frequently asked questions
- What is CVE-2021-24440?
- The Sign-up Sheets WordPress plugin before 1.0.14 did not sanitise or escape some of its fields when creating a new sheet, allowing high privilege users to add JavaScript in them, leading to a Stored Cross-Site Scripting issue. The payloads will be triggered when viewing the 'All Sheets' page in the admin dashboard
- How severe is CVE-2021-24440?
- CVE-2021-24440 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-24440 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-2021-24440?
- CVE-2021-24440 affects Fetchdesigns Sign-up Sheets. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-24440?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-24440 published?
- CVE-2021-24440 was published on 2021-07-12 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:fetchdesigns:sign-up_sheets:*:*:*:*:*:wordpress:*:*
More vulnerabilities in Fetchdesigns Sign-up Sheets
- CVE-2021-24441 — High (CVSS 8.0): The Sign-up Sheets WordPress plugin before 1.0.14 does not not sanitise or validate the Sheet title when generating the…
- CVE-2024-6020 — Medium (CVSS 6.1): The Sign-up Sheets WordPress plugin before 2.2.13 does not escape some generated URLs, as well as the…
- CVE-2023-39165 — Medium (CVSS 5.4): Cross-Site Request Forgery (CSRF) vulnerability in Fetch Designs Sign-up Sheets plugin <= 2.2.8 versions.
All CVEs affecting Fetchdesigns Sign-up Sheets →
Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities
- CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
- CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
- CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
- CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
- CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
- CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…
Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →