Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-49087

21
FAUCET Score

CVE-2023-49087 is a vulnerability in the xml-security library, affecting SimpleSAMLphp's saml2 and xml_security components. It allows for XML signature forgery if an attacker can manipulate the canonicalized DigestValue, potentially leading to unauthorized access or data manipulation. Rated 7.5 HIGH (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N), this flaw is network-exploitable with low attack complexity, impacting integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
5.0.0CPE matchmatch criteria
cpe:2.3:a:simplesamlphp:saml2:5.0.0:alpha12:*:*:*:*:*:*
1.6.11CPE matchmatch criteria
cpe:2.3:a:simplesamlphp:xml-security:1.6.11:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.19%
Probability of exploitation in next 30 days
EPSS Percentile
9.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0019 is in the 1st percentile among its peer group of 51,551 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 (3)

composerpatch availablevia ghsa
Product: simplesamlphp/xml-securityFixed in: 1.6.12
composerpatch availablevia ghsa
Product: simplesamlphp/saml2Fixed in: 5.0.0-alpha.13
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (2)

redhatCVE-2023-49087Moderate

xml-security: insufficient verification of data can lead to signature forging

Nov 30, 2023
composerGHSA-ww7x-3gxh-qm6rhigh

Validation of SignedInfo

Nov 28, 2023

References

github.com / simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b5122317287581
Patch
github.com / simplesamlphp/xml-security/security/advisories/GHSA-ww7x-3gxh-qm6r
ExploitVendor Advisory