CVE-2020-25566: In SapphireIMS 5.0, it is possible to take over an account by sending a request to the Save_Password form as s

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-25566 is a critical-severity flaw (CVSS 9.8) affecting sapphireims. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In SapphireIMS 5.0, it is possible to take over an account by sending a request to the Save_Password form as shown in POC. Notice that we do not require a JSESSIONID in this request and can reset any user’s password by changing the username to that user and password to base64(desired password).

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-306
Published	2021-08-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sapphireims

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

Am I affected?

Timeline

2021-08-11 21:15 UTCPublished CVE record published
2026-06-17 03:06 UTCUpdated Record last modified

sapphireims sapphireims DOWNGRADE

Affected: 5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.0 (Debian / Ubuntu)

apt-cache madison sapphireims sudo apt install sapphireims=<VERSION_BEFORE_5.0> sudo apt-mark hold sapphireims

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

dnf --showduplicates list sapphireims sudo dnf downgrade sapphireims-<VERSION_BEFORE_5.0> sudo dnf versionlock add sapphireims

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-2020-25566?

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

Is CVE-2020-25566 being exploited?

CVE-2020-25566 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-2020-25566 affect?

CVE-2020-25566 affects sapphireims. Severity is critical (CVSS 9.8). In SapphireIMS 5.0, it is possible to take over an account by sending a request to the Save_Password form as shown in POC. Notice that we do not require a JSESSIONID in this request and can reset any user’s password by changing the username

How urgent is CVE-2020-25566?

Priority 63/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-25565 CRITICAL 9.8 DOWNGRADE In SapphireIMS 5.0, it is possible to use the hardcoded credential in clients (username: sapphire, password: i
CVE-2020-25564 HIGH 8.8 DOWNGRADE In SapphireIMS 5.0, it is possible to create local administrator on any client with credentials of a non-privi
CVE-2020-25563 CRITICAL 9.8 DOWNGRADE In SapphireIMS 5.0, it is possible to create local administrator on any client without requiring any credentia
CVE-2020-25562 MEDIUM 6.5 DOWNGRADE In SapphireIMS 5.0, there is no CSRF token present in the entire application
CVE-2020-25561 HIGH 7.8 DOWNGRADE SapphireIMS 5 utilized default sapphire:ims credentials to connect the client to server

References

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