GHSA-w7pm-cc4v-f3g8 GHSA-w7pm-cc4v-f3g8
Deserialization of Untrusted Data in Liferay Portal
Critical
Known exploited
Maven
- Severity
- 9.3 / 10
- Critical · CVSS 4.0
- Exploit chance (EPSS)
- 99.91%
- Chance of exploitation in the next 30 days. Higher than 99.97% of scored vulnerabilities.
- Known exploited
- Yes
- In CISA's catalog
- Weakness
- CWE-502 Deserialization of Untrusted Data
- Fix
4.35.3- Upgrade com.liferay.portal:com.liferay.portal.kernel to this version or later
Description
Deserialization of Untrusted Data in Liferay Portal prior to 7.2.1 CE GA2 allows remote attackers to execute arbitrary code via JSON web services (JSONWS).
Affected versions
Maven
| Package | Vulnerable | Fixed in |
|---|---|---|
| com.liferay.portal:com.liferay.portal.kernel | < 4.35.3 |
4.35.3 |
| com.liferay.portal:com.liferay.portal.kernel | < 4.35.3 |
4.35.3 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
com.liferay.portal:com.liferay.portal.kernel Maven → 4.35.3
- maven
<dependency><groupId>com.liferay.portal</groupId><artifactId>com.liferay.portal.kernel</artifactId><version>4.35.3</version></dependency>- gradle
implementation("com.liferay.portal:com.liferay.portal.kernel:4.35.3")
Severity breakdown
CVSS 4.0 9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- None
- Confidentiality (vulnerable system)
- High
- Integrity (vulnerable system)
- High
- Availability (vulnerable system)
- High
- Confidentiality (subsequent systems)
- None
- Integrity (subsequent systems)
- None
- Availability (subsequent systems)
- None
- Exploit maturity
- Attacked
CVSS 3.1 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
- Exploit maturity
- H
Weakness
CWE-502: Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
How to prevent it
- Architecture and Design, Implementation: If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
- Implementation: When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
- Implementation: Explicitly define a final object() to prevent deserialization.
- Architecture and Design, Implementation: Make fields transient to protect them from deserialization. An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
- Implementation: Avoid having unnecessary types or gadgets (a sequence of instances and method invocations that can self-execute during the deserialization process, often found in libraries) available that can be leveraged for malicious ends. This limits the potential for unintended or unauthorized types and gadgets to be leveraged by the attacker. Add only acceptable classes to an allowlist. Note: new gadgets are constantly being discovered, so this alone is not a sufficient mitigation.
- Architecture and Design, Implementation: Employ cryptography of the data or code for protection. However, it's important to note that it would still be client-side security. This is risky because if the client is compromised then the security implemented on the client (the cryptography) can be bypassed.
- Operation: Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].
References
Advisories
Packages
Other links
- portal.liferay.dev/learn/security/known-vulnerabilities
- portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/…
- packetstormsecurity.com/files/157254/Liferay-Portal-Java-Unmarshalling-Remote-Code-Execution…
- packetstormsecurity.com/files/158392/Liferay-Portal-Remote-Code-Execution.html
- research.checkpoint.com/2021/freakout-leveraging-newest-vulnerabilities-for-creating-a-botnet
- github.com/liferay/liferay-portal/blob/7.2.1-ga2/portal-kernel/bnd.bnd
- cisa.gov/known-exploited-vulnerabilities-catalog
Timeline
- Published
- Last updated by the source
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-xvgg-9h29-4g34 Liferay Portal has Improper Validation of Specified Quantity in Input | High | Also affects com.liferay.portal:com.liferay.portal.kernel |
| GHSA-43h9-p3j4-39hm Liferay Portal defaults to a low work factor for the default password hashing algorithm | High | Also affects com.liferay.portal:com.liferay.portal.kernel |
| CVE-2026-110879 jackson-databind validates the outer class of a class-name type ID but accepts attacker-selected classes inside its generic arguments, even when those classes… | Critical | Same weakness, CWE-502 |
| GHSA-6757-hggm-hp2w vLLM: Public multimodal SHM handle forgery reaches worker-side `pickle.loads()` with insecure serialization disabled | High | Same weakness, CWE-502 |
| GHSA-673q-mjm6-r5xr Next.js: Unauthenticated Remote Code Execution in `use cache` functions returning typed arrays | Critical | Same weakness, CWE-502 |
| GHSA-c27m-942f-rcfh Microsoft Security Advisory CVE-2026-87697 - .NET and Visual Studio Remote Code Execution Vulnerability | High | Same weakness, CWE-502 |
| GHSA-4w5f-7jp2-w48g Microsoft Security Advisory CVE-2026-83520 - .NET and Visual Studio Remote Code Execution Vulnerability | High | Same weakness, CWE-502 |
| GHSA-4j9v-h7pp-725h Microsoft Security Advisory CVE-2026-70035 - .NET and Visual Studio Remote Code Execution Vulnerability | High | Same weakness, CWE-502 |
Credits: amuravski, liefke
MergeHarbor checks every repository's dependencies against this database, ranks what matters by exploitability and reachability, routes it to the owning team and opens the fix pull request.
Check your repos with MergeHarbor