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CVE-2015-1831

26
FAUCET Score

CVE-2015-1831 describes a vulnerability in Apache Struts 2.3.20 where default exclude patterns (excludeParams) can be bypassed, allowing remote attackers to compromise an application's internal state. With a CVSS score of 7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P), this vulnerability is considered high severity, indicating it can be exploited remotely with low complexity and lead to partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.3.20CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.3.20:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
6.31%
Probability of exploitation in next 30 days
EPSS Percentile
92.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0631 is in the 88th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

mavenpatch availablevia ghsa
Product: org.apache.struts:struts2-coreFixed in: 2.3.20.1
mavenpatch availablevia ghsa
Product: org.apache.struts.xwork:xwork-coreFixed in: 2.3.20.1

Vendor Advisories (2)

mavenGHSA-q2cg-xf9p-h457high

Incomplete exclude pattern in Apache Struts

May 17, 2022
redhatCVE-2015-1831Moderate

struts2: incorrect default exclude patterns

May 11, 2015

References

struts.apache.org / docs/s2-024.html
Vendor Advisory
securityfocus.com / bid/75940
securitytracker.com / id/1032985