CVE-2021-47721: Orangescrum 1.8.0 contains a privilege escalation vulnerability that allows authenticated users to take over o

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HIGH 8.8DOWNGRADE

CVE-2021-47721 is a high-severity flaw (CVSS 8.8) affecting orangescrum. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-639
Published	2025-12-23
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: orangescrum

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-23 20:15 UTCPublished CVE record published
2026-06-17 04:18 UTCUpdated Record last modified

orangescrum orangescrum DOWNGRADE

Affected: 1.8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.8.0

1. Check installed version

apt-cache policy orangescrum || rpm -q orangescrum || orangescrum --version

2. No fixed release: DOWNGRADE to a release before 1.8.0 (Debian / Ubuntu)

apt-cache madison orangescrum sudo apt install orangescrum=<VERSION_BEFORE_1.8.0> sudo apt-mark hold orangescrum

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list orangescrum sudo dnf downgrade orangescrum-<VERSION_BEFORE_1.8.0> sudo dnf versionlock add orangescrum

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-47721?

orangescrum: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-47721 being exploited?

CVE-2021-47721 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-47721 affect?

CVE-2021-47721 affects orangescrum. Severity is high (CVSS 8.8). 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

How urgent is CVE-2021-47721?

Priority 46/100. High severity; Public exploit reference

Related CVEs

CVE-2024-48392 MEDIUM 5.4 DOWNGRADE OrangeScrum v2.0.11 is vulnerable to Cross Site Scripting (XSS)
CVE-2021-47720 HIGH 7.1 DOWNGRADE Orangescrum 1.8.0 contains an authenticated SQL injection vulnerability that allows authorized users to manipu
CVE-2021-47716 MEDIUM 5.4 DOWNGRADE Orangescrum 1.8.0 contains multiple cross-site scripting vulnerabilities that allow authenticated attackers to

References

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