How severe is CVE-2023-33961?

CVE-2023-33961 has a CVSS 3.x base score of 8.9, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2023-33961 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-33961?

CVE-2023-33961 affects Leantime. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-33961?

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-2023-33961 published?

CVE-2023-33961 was published on 2023-05-30 and last updated on 2026-06-17.

CVE-2023-33961

CVE-2023-33961 is a high-severity vulnerability in Leantime with a CVSS 3.x base score of 8.9. 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-79.

Key facts

Severity: High (CVSS 3.x base score 8.9)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Leantime
Published: 2023-05-30
Last modified: 2026-06-17

Description

Leantime is a lean open source project management system. Starting in version 2.3.21, an authenticated user with commenting privileges can inject malicious Javascript into a comment. Once the malicious comment is loaded in the browser by a user, the malicious Javascript code executes. As of time of publication, a patch does not exist.

Frequently asked questions

What is CVE-2023-33961?: Leantime is a lean open source project management system. Starting in version 2.3.21, an authenticated user with commenting privileges can inject malicious Javascript into a comment. Once the malicious comment is loaded in the browser by a user, the malicious Javascript code executes. As of time of publication, a patch does not exist.
How severe is CVE-2023-33961?: CVE-2023-33961 has a CVSS 3.x base score of 8.9, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2023-33961 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-33961?: CVE-2023-33961 affects Leantime. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-33961?: 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-2023-33961 published?: CVE-2023-33961 was published on 2023-05-30 and last updated on 2026-06-17.

References

https://github.com/Leantime/leantime/security/advisories/GHSA-359m-fp6q-65r7

Affected products (1)

cpe:2.3:a:leantime:leantime:*:*:*:*:*:*:*:*

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