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14 vulnerabilities by calcom
CVE-2026-9349 (GCVE-0-2026-9349)
Vulnerability from nvd – Published: 2026-05-24 02:30 – Updated: 2026-05-26 13:37
VLAI
Title
calcom cal.diy Generic React API bookings-single-view.getServerSideProps.tsx getServerSideProps information disclosure
Summary
A vulnerability was determined in calcom cal.diy up to 4.9.4. Affected by this issue is the function getServerSideProps of the file apps/web/modules/bookings/views/bookings-single-view.getServerSideProps.tsx of the component Generic React API. This manipulation of the argument cancelledBy/rescheduledBy causes information disclosure. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/365312 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/365312/cti | signaturepermissions-required |
| https://vuldb.com/submit/812177 | third-party-advisory |
| https://gist.github.com/YLChen-007/b59c44d1550c4b… | exploit |
Impacted products
Credits
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CVE-2026-9304 (GCVE-0-2026-9304)
Vulnerability from nvd – Published: 2026-05-23 13:45 – Updated: 2026-05-26 13:57
VLAI
Title
calcom cal.diy Logo API route.ts validateUrlForSSRF server-side request forgery
Summary
A security flaw has been discovered in calcom cal.diy up to 4.9.4. The affected element is the function validateUrlForSSRF of the file apps/web/app/api/logo/route.ts of the component Logo API. The manipulation results in server-side request forgery. It is possible to launch the attack remotely. Attacks of this nature are highly complex. The exploitability is described as difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-918 - Server-Side Request Forgery
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/365251 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/365251/cti | signaturepermissions-required |
| https://vuldb.com/submit/812176 | third-party-advisory |
| https://gist.github.com/YLChen-007/b3d0b85767b7e3… | exploit |
Impacted products
Credits
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CVE-2026-9303 (GCVE-0-2026-9303)
Vulnerability from nvd – Published: 2026-05-23 13:30 – Updated: 2026-05-26 18:41
VLAI
Title
calcom cal.diy cross-site request forgery
Summary
A vulnerability was identified in calcom cal.diy up to 4.9.4. Impacted is an unknown function. The manipulation leads to cross-site request forgery. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/365250 | vdb-entry |
| https://vuldb.com/vuln/365250/cti | signaturepermissions-required |
| https://vuldb.com/submit/812173 | third-party-advisory |
| https://vuldb.com/submit/812175 | third-party-advisory |
| https://gist.github.com/YLChen-007/26663d9558e159… | related |
| https://gist.github.com/YLChen-007/dafada36e356bc… | exploit |
Impacted products
Credits
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CVE-2026-23478 (GCVE-0-2026-23478)
Vulnerability from nvd – Published: 2026-01-13 21:37 – Updated: 2026-01-14 16:56
VLAI
Title
Cal.com has an Authentication Bypass via Unvalidated Email in Custom JWT Callback
Summary
Cal.com is open-source scheduling software. From 3.1.6 to before 6.0.7, there is a vulnerability in a custom NextAuth JWT callback that allows attackers to gain full authenticated access to any user's account by supplying a target email address via session.update(). This vulnerability is fixed in 6.0.7.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/calcom/cal.com/security/adviso… | x_refsource_CONFIRM |
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CVE-2025-66489 (GCVE-0-2025-66489)
Vulnerability from nvd – Published: 2025-12-03 19:44 – Updated: 2025-12-03 21:48
VLAI
Title
Cal.com Authentication Bypass via bad TOTP + password checks
Summary
Cal.com is open-source scheduling software. Prior to 5.9.8, A flaw in the login credentials provider allows an attacker to bypass password verification when a TOTP code is provided, potentially gaining unauthorized access to user accounts. This issue exists due to problematic conditional logic in the authentication flow. This vulnerability is fixed in 5.9.8.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/calcom/cal.com/security/adviso… | x_refsource_CONFIRM |
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CVE-2023-37919 (GCVE-0-2023-37919)
Vulnerability from nvd – Published: 2023-07-25 20:42 – Updated: 2024-10-16 19:45
VLAI
Title
Cal.com not expiring old sessions after enabling 2FA
Summary
Cal.com is open-source scheduling software. A vulnerability allows active sessions associated with an account to remain active even after enabling 2FA. When activating 2FA on a Cal.com account that is logged in on two or more devices, the account stays logged in on the other device(s) stays logged in without having to verify the account owner's identity. As of time of publication, no known patches or workarounds exist.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-613 - Insufficient Session Expiration
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/calcom/cal.com/security/adviso… | x_refsource_CONFIRM |
Impacted products
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CVE-2023-1647 (GCVE-0-2023-1647)
Vulnerability from nvd – Published: 2023-03-27 00:00 – Updated: 2025-02-19 16:32
VLAI
Title
Improper Access Control in calcom/cal.com
Summary
Improper Access Control in GitHub repository calcom/cal.com prior to 2.7.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-284 - Improper Access Control
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| calcom | calcom/cal.com |
Affected:
unspecified , < 2.7
(custom)
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CVE-2026-9349 (GCVE-0-2026-9349)
Vulnerability from cvelistv5 – Published: 2026-05-24 02:30 – Updated: 2026-05-26 13:37
VLAI
Title
calcom cal.diy Generic React API bookings-single-view.getServerSideProps.tsx getServerSideProps information disclosure
Summary
A vulnerability was determined in calcom cal.diy up to 4.9.4. Affected by this issue is the function getServerSideProps of the file apps/web/modules/bookings/views/bookings-single-view.getServerSideProps.tsx of the component Generic React API. This manipulation of the argument cancelledBy/rescheduledBy causes information disclosure. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/365312 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/365312/cti | signaturepermissions-required |
| https://vuldb.com/submit/812177 | third-party-advisory |
| https://gist.github.com/YLChen-007/b59c44d1550c4b… | exploit |
Impacted products
Credits
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CVE-2026-9304 (GCVE-0-2026-9304)
Vulnerability from cvelistv5 – Published: 2026-05-23 13:45 – Updated: 2026-05-26 13:57
VLAI
Title
calcom cal.diy Logo API route.ts validateUrlForSSRF server-side request forgery
Summary
A security flaw has been discovered in calcom cal.diy up to 4.9.4. The affected element is the function validateUrlForSSRF of the file apps/web/app/api/logo/route.ts of the component Logo API. The manipulation results in server-side request forgery. It is possible to launch the attack remotely. Attacks of this nature are highly complex. The exploitability is described as difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-918 - Server-Side Request Forgery
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/365251 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/365251/cti | signaturepermissions-required |
| https://vuldb.com/submit/812176 | third-party-advisory |
| https://gist.github.com/YLChen-007/b3d0b85767b7e3… | exploit |
Impacted products
Credits
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CVE-2026-9303 (GCVE-0-2026-9303)
Vulnerability from cvelistv5 – Published: 2026-05-23 13:30 – Updated: 2026-05-26 18:41
VLAI
Title
calcom cal.diy cross-site request forgery
Summary
A vulnerability was identified in calcom cal.diy up to 4.9.4. Impacted is an unknown function. The manipulation leads to cross-site request forgery. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/365250 | vdb-entry |
| https://vuldb.com/vuln/365250/cti | signaturepermissions-required |
| https://vuldb.com/submit/812173 | third-party-advisory |
| https://vuldb.com/submit/812175 | third-party-advisory |
| https://gist.github.com/YLChen-007/26663d9558e159… | related |
| https://gist.github.com/YLChen-007/dafada36e356bc… | exploit |
Impacted products
Credits
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CVE-2026-23478 (GCVE-0-2026-23478)
Vulnerability from cvelistv5 – Published: 2026-01-13 21:37 – Updated: 2026-01-14 16:56
VLAI
Title
Cal.com has an Authentication Bypass via Unvalidated Email in Custom JWT Callback
Summary
Cal.com is open-source scheduling software. From 3.1.6 to before 6.0.7, there is a vulnerability in a custom NextAuth JWT callback that allows attackers to gain full authenticated access to any user's account by supplying a target email address via session.update(). This vulnerability is fixed in 6.0.7.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/calcom/cal.com/security/adviso… | x_refsource_CONFIRM |
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CVE-2025-66489 (GCVE-0-2025-66489)
Vulnerability from cvelistv5 – Published: 2025-12-03 19:44 – Updated: 2025-12-03 21:48
VLAI
Title
Cal.com Authentication Bypass via bad TOTP + password checks
Summary
Cal.com is open-source scheduling software. Prior to 5.9.8, A flaw in the login credentials provider allows an attacker to bypass password verification when a TOTP code is provided, potentially gaining unauthorized access to user accounts. This issue exists due to problematic conditional logic in the authentication flow. This vulnerability is fixed in 5.9.8.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/calcom/cal.com/security/adviso… | x_refsource_CONFIRM |
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CVE-2023-37919 (GCVE-0-2023-37919)
Vulnerability from cvelistv5 – Published: 2023-07-25 20:42 – Updated: 2024-10-16 19:45
VLAI
Title
Cal.com not expiring old sessions after enabling 2FA
Summary
Cal.com is open-source scheduling software. A vulnerability allows active sessions associated with an account to remain active even after enabling 2FA. When activating 2FA on a Cal.com account that is logged in on two or more devices, the account stays logged in on the other device(s) stays logged in without having to verify the account owner's identity. As of time of publication, no known patches or workarounds exist.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-613 - Insufficient Session Expiration
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/calcom/cal.com/security/adviso… | x_refsource_CONFIRM |
Impacted products
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CVE-2023-1647 (GCVE-0-2023-1647)
Vulnerability from cvelistv5 – Published: 2023-03-27 00:00 – Updated: 2025-02-19 16:32
VLAI
Title
Improper Access Control in calcom/cal.com
Summary
Improper Access Control in GitHub repository calcom/cal.com prior to 2.7.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-284 - Improper Access Control
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| calcom | calcom/cal.com |
Affected:
unspecified , < 2.7
(custom)
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