How severe is CVE-2022-22686?

CVE-2022-22686 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2022-22686 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-22686?

CVE-2022-22686 affects Synology Calendar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-22686?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-22686 published?

CVE-2022-22686 was published on 2022-07-26 and last updated on 2026-06-17.

CVE-2022-22686

CVE-2022-22686 is a medium-severity vulnerability in Synology Calendar with a CVSS 3.x base score of 6.5. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Synology Calendar
Published: 2022-07-26
Last modified: 2026-06-17

Description

Cross-Site Request Forgery (CSRF) vulnerability in webapi component in Synology Calendar before 2.3.4-0631 allows remote authenticated users to hijack the authentication of administrators via unspecified vectors.

Frequently asked questions

What is CVE-2022-22686?: Cross-Site Request Forgery (CSRF) vulnerability in webapi component in Synology Calendar before 2.3.4-0631 allows remote authenticated users to hijack the authentication of administrators via unspecified vectors.
How severe is CVE-2022-22686?: CVE-2022-22686 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2022-22686 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-22686?: CVE-2022-22686 affects Synology Calendar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-22686?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-22686 published?: CVE-2022-22686 was published on 2022-07-26 and last updated on 2026-06-17.

References

https://www.synology.com/security/advisory/Synology_SA_20_07

Affected products (1)

cpe:2.3:a:synology:calendar:*:*:*:*:*:*:*:*

More vulnerabilities in Synology Calendar

CVE-2019-11829 — High (CVSS 7.3): OS command injection vulnerability in drivers_syno_import_user.php in Synology Calendar before 2.3.1-0617 allows remote…
CVE-2022-22682 — Medium (CVSS 6.5): Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Event Management…
CVE-2019-11825 — Medium (CVSS 6.5): Cross-site scripting (XSS) vulnerability in Event Editor in Synology Calendar before 2.3.0-0615 allows remote attackers…
CVE-2018-8915 — Medium (CVSS 6.5): Cross-site scripting (XSS) vulnerability in Notification Center in Synology Calendar before 2.1.1-0502 allows remote…
CVE-2017-15891 — Medium (CVSS 6.5): Improper access control vulnerability in SYNO.Cal.EventBase in Synology Calendar before 2.0.1-0242 allows remote…
CVE-2021-34812 — Medium (CVSS 5.8): Use of hard-coded credentials vulnerability in php component in Synology Calendar before 2.4.0-0761 allows remote…

All CVEs affecting Synology Calendar →

Other CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities

CVE-2025-32642 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in appsbd Vite Coupon vite-coupon allows Remote Code Inclusion.This…
CVE-2025-23922 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in Harsh iSpring Embedder embed-ispring allows Upload a Web Shell to a…
CVE-2017-5145 — Critical (CVSS 10.0): An issue was discovered in Carlo Gavazzi VMU-C EM prior to firmware Version A11_U05, and VMU-C PV prior to firmware…
CVE-2019-25729 — Critical (CVSS 9.8): PDF Signer 3.0 contains a server-side template injection vulnerability that allows unauthenticated attackers to execute…
CVE-2025-48340 — Critical (CVSS 9.8): Cross-Site Request Forgery (CSRF) vulnerability in Danny Vink User Profile Meta Manager user-profile-meta allows…
CVE-2025-2907 — Critical (CVSS 9.8): The Order Delivery Date WordPress plugin before 12.3.1 does not have authorization and CSRF checks when importing…

Browse all CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities →