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» GHSA-v6w3-2prq-h95f
Description
In the Jakarta Expression Language implementation 3.0.3 and earlier, a bug in the ELParserTokenManager enables invalid EL expressions to be evaluated as if they were valid.
Basic information
Type
reviewed
Severity
medium Advisory on GitHub
Open advisory ↗ Repository advisory
—
Source code
Browse source ↗ Published (advisory)
2021-10-06 17:48:38 UTC
Updated
2025-07-01 16:13:52 UTC
GitHub reviewed
2021-10-06 13:31:54 UTC
NVD published
2021-05-26
EPSS Score
Score
Percentile
0.11%
30.03%
CVSS Scores
Base score
Version
Severity
Vector
5.3
3.1
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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
CWEs
CWE id
Name
CWE-20
Improper Input Validation
CWE-917
Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
Affected packages (3)
Vulnerable version ranges and first patched releases as published by GitHub.
Ecosystem
Package
Vulnerable range
First patched
Vulnerable functions
maven
com.sun.el:el-ri < 3.0.4
3.0.4
—
maven
org.glassfish:jakarta.el < 3.0.4
3.0.4
—
maven
org.glassfish:javax.el <= 3.0.1-b12
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cvelogic
Threat Intelligence