CVE-2021-39501
CVE-2021-39501 is a medium-severity vulnerability in Eyoucms 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-601.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 5.8
- EPSS exploit prediction: 4% (88th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-601
- Affected product: Eyoucms
- Published:
- Last modified:
Description
EyouCMS 1.5.4 is vulnerable to Open Redirect. An attacker can redirect a user to a malicious url via the Logout function.
Frequently asked questions
- What is CVE-2021-39501?
- EyouCMS 1.5.4 is vulnerable to Open Redirect. An attacker can redirect a user to a malicious url via the Logout function.
- How severe is CVE-2021-39501?
- CVE-2021-39501 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-2021-39501 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-39501?
- CVE-2021-39501 affects Eyoucms. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-39501?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-39501 published?
- CVE-2021-39501 was published on 2021-09-07 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:eyoucms:eyoucms:1.5.4:*:*:*:*:*:*:*
More vulnerabilities in Eyoucms
- CVE-2023-42286 — Critical (CVSS 9.8): There is a PHP file inclusion vulnerability in the template configuration of eyoucms v1.6.4, allowing attackers to…
- CVE-2022-26273 — Critical (CVSS 9.8): EyouCMS v1.5.4 was discovered to lack parameter filtering in \user\controller\shop.php, leading to payment logic…
- CVE-2022-26279 — Critical (CVSS 9.8): EyouCMS v1.5.5 was discovered to have no access control in the component /data/sqldata.
- CVE-2020-24000 — Critical (CVSS 9.8): SQL Injection vulnerability in eyoucms cms v1.4.7, allows attackers to execute arbitrary code and disclose sensitive…
- CVE-2021-39497 — Critical (CVSS 9.8): eyoucms 1.5.4 lacks sanitization of input data, allowing an attacker to inject a url to trigger blind SSRF via the…
- CVE-2022-44387 — High (CVSS 8.8): EyouCMS V1.5.9-UTF8-SP1 was discovered to contain a Cross-Site Request Forgery (CSRF) via the Basic Information…
Other CWE-601 (Open Redirect) vulnerabilities
- CVE-2018-3774 — Critical (CVSS 10.0): Incorrect parsing in url-parse <1.4.3 returns wrong hostname which leads to multiple vulnerabilities such as SSRF, Open…
- CVE-2019-25282 — Critical (CVSS 9.8): V-SOL GPON/EPON OLT Platform v2.03 contains an open redirect vulnerability in the script that allows attackers to…
- CVE-2020-36912 — Critical (CVSS 9.8): Plexus anblick Digital Signage Management 3.1.13 contains an open redirect vulnerability in the 'PantallaLogin' script…
- CVE-2025-43526 — Critical (CVSS 9.8): This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac…
- CVE-2025-55031 — Critical (CVSS 9.8): Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An…
- CVE-2024-22891 — Critical (CVSS 9.8): Nteract v.0.28.0 was discovered to contain a remote code execution (RCE) vulnerability via the Markdown link.