CVE-2020-21345
CVE-2020-21345 is a medium-severity vulnerability in Halo 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% (52nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Halo
- Published:
- Last modified:
Description
Cross Site Scripting (XSS) vulnerability in Halo 1.1.3 via post publish components in the manage panel, which lets a remote malicious user execute arbitrary code.
Frequently asked questions
- What is CVE-2020-21345?
- Cross Site Scripting (XSS) vulnerability in Halo 1.1.3 via post publish components in the manage panel, which lets a remote malicious user execute arbitrary code.
- How severe is CVE-2020-21345?
- CVE-2020-21345 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-2020-21345 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-21345?
- CVE-2020-21345 affects Halo. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-21345?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-21345 published?
- CVE-2020-21345 was published on 2021-05-20 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:halo:halo:1.1.3:-:*:*:*:*:*:*
More vulnerabilities in Halo
- CVE-2022-32995 — Critical (CVSS 9.8): Halo CMS v1.5.3 was discovered to contain a Server-Side Request Forgery (SSRF) via the template remote download…
- CVE-2022-32994 — Critical (CVSS 9.8): Halo CMS v1.5.3 was discovered to contain an arbitrary file upload vulnerability via the component…
- CVE-2020-18980 — Critical (CVSS 9.8): Remote Code Executon vulnerability in Halo 0.4.3 via the remoteAddr and themeName parameters.
- CVE-2020-21526 — Critical (CVSS 9.8): An Arbitrary file writing vulnerability in halo v1.1.3. In an interface to write files in the background, a directory…
- CVE-2020-21523 — Critical (CVSS 9.8): A Server-Side Freemarker template injection vulnerability in halo CMS v1.1.3 In the Edit Theme File function. The ftl…
- CVE-2020-21522 — Critical (CVSS 9.8): An issue was discovered in halo V1.1.3. A Zip Slip Directory Traversal Vulnerability in the backend,the attacker can…
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 →