CVE-2021-27811
CVE-2021-27811 is a high-severity vulnerability in Qibosoft with a CVSS 3.x base score of 7.2. 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-94.
Key facts
- Severity: High (CVSS 3.x base score 7.2)
- CVSS v2: 6.5
- EPSS exploit prediction: 1% (64th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-94
- Affected product: Qibosoft
- Published:
- Last modified:
Description
A code injection vulnerability has been discovered in the Upgrade function of QibosoftX1 v1.0. An attacker is able execute arbitrary PHP code via exploitation of client_upgrade_edition.php and Upgrade.php.
Frequently asked questions
- What is CVE-2021-27811?
- A code injection vulnerability has been discovered in the Upgrade function of QibosoftX1 v1.0. An attacker is able execute arbitrary PHP code via exploitation of client_upgrade_edition.php and Upgrade.php.
- How severe is CVE-2021-27811?
- CVE-2021-27811 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-27811 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-27811?
- CVE-2021-27811 affects Qibosoft. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-27811?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-27811 published?
- CVE-2021-27811 was published on 2021-05-21 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:qibosoft:qibosoft:1.0:*:*:*:*:*:*:*
More vulnerabilities in Qibosoft
- CVE-2019-17613 — Critical (CVSS 9.8): qibosoft 7 allows remote code execution because do/jf.php makes eval calls. The attacker can use the Point Introduction…
- CVE-2020-20944 — Critical (CVSS 9.1): An issue in /admin/index.php?lfj=mysql&action=del of Qibosoft v7 allows attackers to arbitrarily delete files.
- CVE-2020-20945 — High (CVSS 8.8): A Cross-Site Request Forgery (CSRF) in /admin/index.php?lfj=member&action=editmember of Qibosoft v7 allows attackers to…
- CVE-2018-18201 — High (CVSS 8.8): qibosoft V7.0 allows CSRF via admin/index.php?lfj=member&action=addmember to add a user account.
- CVE-2019-5725 — High (CVSS 7.5): qibosoft through V7 allows remote attackers to read arbitrary files via the member/index.php main parameter, as…
- CVE-2020-20808 — Medium (CVSS 6.1): Cross Site Scripting vulnerability in Qibosoft qibosoft v.7 and before allows a remote attacker to execute arbitrary…
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