How severe is CVE-2021-47721?

CVE-2021-47721 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-47721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47721?

CVE-2021-47721 affects Orangescrum. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47721?

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.

Does CVE-2021-47721 have an EU (EUVD) identifier?

Yes. CVE-2021-47721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204841.

When was CVE-2021-47721 published?

CVE-2021-47721 was published on 2025-12-23 and last updated on 2026-06-17.

CVE-2021-47721

CVE-2021-47721 is a high-severity vulnerability in Orangescrum with a CVSS 3.x base score of 8.8. 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-639.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204841
Weakness: CWE-639
Affected product: Orangescrum
Published: 2025-12-23
Last modified: 2026-06-17

Description

Orangescrum 1.8.0 contains a privilege escalation vulnerability that allows authenticated users to take over other project-assigned accounts by manipulating session cookies. Attackers can extract the victim's unique ID from the page source and replace their own session cookie to gain unauthorized access to another user's account.

Frequently asked questions

What is CVE-2021-47721?: Orangescrum 1.8.0 contains a privilege escalation vulnerability that allows authenticated users to take over other project-assigned accounts by manipulating session cookies. Attackers can extract the victim's unique ID from the page source and replace their own session cookie to gain unauthorized access to another user's account.
How severe is CVE-2021-47721?: CVE-2021-47721 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-47721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47721?: CVE-2021-47721 affects Orangescrum. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47721?: 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.
Does CVE-2021-47721 have an EU (EUVD) identifier?: Yes. CVE-2021-47721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204841.
When was CVE-2021-47721 published?: CVE-2021-47721 was published on 2025-12-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:orangescrum:orangescrum:1.8.0:*:*:*:*:*:*:*

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