CVE-2021-27773
CVE-2021-27773 is a medium-severity vulnerability in Hcltech Sametime with a CVSS 3.x base score of 4.2. 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-1021.
Key facts
- Severity: Medium (CVSS 3.x base score 4.2)
- CVSS v2: 4.3
- EPSS exploit prediction: 0% (35th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-1021
- Affected product: Hcltech Sametime
- Published:
- Last modified:
Description
This vulnerability allows users to execute a clickjacking attack in the meeting's chat.
Frequently asked questions
- What is CVE-2021-27773?
- This vulnerability allows users to execute a clickjacking attack in the meeting's chat.
- How severe is CVE-2021-27773?
- CVE-2021-27773 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-27773 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-27773?
- CVE-2021-27773 affects Hcltech Sametime. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-27773?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-27773 published?
- CVE-2021-27773 was published on 2022-05-12 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:hcltech:sametime:11.6:*:*:*:*:*:*:*
More vulnerabilities in Hcltech Sametime
- CVE-2021-27771 — High (CVSS 8.2): User SID can be modified resulting in an Arbitrary File Upload or deletion of directories causing a Denial of Service.…
- CVE-2021-27772 — High (CVSS 7.1): Users are able to read group conversations without actively taking part in them. Next to one to one conversations,…
- CVE-2021-27770 — Medium (CVSS 6.8): The vulnerability was discovered within the “FaviconService”. The service takes a base64-encoded URL which is then…
- CVE-2022-42446 — Medium (CVSS 6.5): Starting with Sametime 12, anonymous users are enabled by default. After logging in as an anonymous user, one has the…
- CVE-2023-50349 — Medium (CVSS 5.9): Sametime is impacted by a Cross Site Request Forgery (CSRF) vulnerability. Some REST APIs in the Sametime Proxy…
- CVE-2024-30122 — Medium (CVSS 5.8): HCL Sametime is impacted by misconfigured security related HTTP headers. It was identified that some HTTP headers were…
All CVEs affecting Hcltech Sametime →
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