How severe is CVE-2025-65021?

CVE-2025-65021 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2025-65021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-65021?

CVE-2025-65021 affects Rallly. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-65021?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-65021 have an EU (EUVD) identifier?

Yes. CVE-2025-65021 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198223.

When was CVE-2025-65021 published?

CVE-2025-65021 was published on 2025-11-19 and last updated on 2026-06-17.

CVE-2025-65021

CVE-2025-65021 is a critical-severity vulnerability in Rallly with a CVSS 3.x base score of 9.1. 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-285.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198223
Weakness: CWE-285
Affected product: Rallly
Published: 2025-11-19
Last modified: 2026-06-17

Description

Rallly is an open-source scheduling and collaboration tool. Prior to version 4.5.4, an Insecure Direct Object Reference (IDOR) vulnerability exists in the poll finalization feature of the application. Any authenticated user can finalize a poll they do not own by manipulating the pollId parameter in the request. This allows unauthorized users to finalize other users’ polls and convert them into events without proper authorization checks, potentially disrupting user workflows and causing data integrity and availability issues. This issue has been patched in version 4.5.4.

Frequently asked questions

What is CVE-2025-65021?: Rallly is an open-source scheduling and collaboration tool. Prior to version 4.5.4, an Insecure Direct Object Reference (IDOR) vulnerability exists in the poll finalization feature of the application. Any authenticated user can finalize a poll they do not own by manipulating the pollId parameter in the request. This allows unauthorized users to finalize other users’ polls and convert them into events without proper authorization checks, potentially disrupting user workflows and causing data integrity and availability issues. This issue has been patched in version 4.5.4.
How severe is CVE-2025-65021?: CVE-2025-65021 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2025-65021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-65021?: CVE-2025-65021 affects Rallly. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-65021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-65021 have an EU (EUVD) identifier?: Yes. CVE-2025-65021 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198223.
When was CVE-2025-65021 published?: CVE-2025-65021 was published on 2025-11-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rallly:rallly:*:*:*:*:*:*:*:*

More vulnerabilities in Rallly

CVE-2025-47781 — Critical (CVSS 9.8): Rallly is an open-source scheduling and collaboration tool. Versions up to and including 3.22.1 of the application…
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CVE-2025-65029 — High (CVSS 8.1): Rallly is an open-source scheduling and collaboration tool. Prior to version 4.5.4, an insecure direct object reference…
CVE-2025-65030 — High (CVSS 7.1): Rallly is an open-source scheduling and collaboration tool. Prior to version 4.5.4, an authorization flaw in the…
CVE-2025-66027 — Medium (CVSS 6.5): Rallly is an open-source scheduling and collaboration tool. Prior to version 4.5.6, an information disclosure…

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