CVE-2022-25898

Name: CVE-2022-25898
Creator: NVD / NIST
Published: 2022-07-01T20:15:08.023+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.91%

Last modified Jun 22, 2026

CVE-2022-25898 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The package jsrsasign before 10.5.25 are vulnerable to Improper Verification of Cryptographic Signature when JWS or JWT signature with non Base64URL encoding special characters or number escaped characters may be validated as valid by mistake. Workaround: Validate JWS or JWT signature if it has Base64URL and dot safe string before executing JWS.verify() or JWS.verifyJWT() method.. EPSS estimates a 0.91% chance of exploitation in the next 30 days.

Description

The package jsrsasign before 10.5.25 are vulnerable to Improper Verification of Cryptographic Signature when JWS or JWT signature with non Base64URL encoding special characters or number escaped characters may be validated as valid by mistake. Workaround: Validate JWS or JWT signature if it has Base64URL and dot safe string before executing JWS.verify() or JWS.verifyJWT() method.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.91%

55.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
Kjur	Jsrsasign	>= 4.8.0, < 10.5.25

References

https://github.com/kjur/jsrsasign/commit/4536a6e9e8bcf1a644ab7c07ed96e453347dae41Patch, Third Party Advisory
https://github.com/kjur/jsrsasign/releases/tag/10.5.25Release Notes, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2935898Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBKJUR-2935897Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2935896Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-JSRSASIGN-2869122Exploit, Patch, Third Party Advisory
https://github.com/kjur/jsrsasign/commit/4536a6e9e8bcf1a644ab7c07ed96e453347dae41Patch, Third Party Advisory
https://github.com/kjur/jsrsasign/releases/tag/10.5.25Release Notes, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2935898Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBKJUR-2935897Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2935896Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-JSRSASIGN-2869122Exploit, Patch, Third Party Advisory

Timeline

Published: Jul 1, 2022
Last Modified: Jun 22, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-25898?

How severe is CVE-2022-25898?

CVE-2022-25898 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.91% probability of exploitation in the next 30 days.

How do I fix CVE-2022-25898?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-25898?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST