Skip to content
Log inStart free trial

GHSA-7m6r-fhh7-r47c BIT-parse-2026-31828 CVE-2026-31828

Parse Server vulnerable to LDAP injection via unsanitized user input in DN and group filter construction

High npm
Severity
0.0 / 10
High · CVSS 4.0
Exploit chance (EPSS)
0.45%
Chance of exploitation in the next 30 days. Higher than 39.05% of scored vulnerabilities.
Known exploited
No
Not in CISA's catalog
Weakness
CWE-90 Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
Fix
9.5.2-alpha.13
Upgrade parse-server to this version or later

Description

Impact

The LDAP authentication adapter is vulnerable to LDAP injection. User-supplied input (authData.id) is interpolated directly into LDAP Distinguished Names (DN) and group search filters without escaping special characters. This allows an attacker with valid LDAP credentials to manipulate the bind DN structure and to bypass group membership checks. This enables privilege escalation from any authenticated LDAP user to a member of any restricted group.

The vulnerability affects Parse Server deployments that use the LDAP authentication adapter with group-based access control.

Patches

The vulnerability is fixed by escaping user input before interpolation into DN strings (per RFC 4514) and LDAP filter strings (per RFC 4515).

Workarounds

There is no known workaround.

References

Affected versions

npm

PackageVulnerableFixed in
parse-server
>= 9.0.0-alpha.1, < 9.5.2-alpha.13
9.5.2-alpha.13
parse-server
< 8.6.26
8.6.26

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.

parse-server npm → 9.5.2-alpha.13

npm
npm install parse-server@9.5.2-alpha.13
yarn
yarn add parse-server@9.5.2-alpha.13
pnpm
pnpm add parse-server@9.5.2-alpha.13

Severity breakdown

CVSS 4.0 0.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Attack vector
Network
Attack complexity
Low
Attack requirements
Present
Privileges required
Low
User interaction
None
Confidentiality (vulnerable system)
None
Integrity (vulnerable system)
High
Availability (vulnerable system)
None
Confidentiality (subsequent systems)
None
Integrity (subsequent systems)
None
Availability (subsequent systems)
None

CVSS 3.1 8.8

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

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Weakness

CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')

The product constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query when it is sent to a downstream component.

How to prevent it
  • Implementation: Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does. When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue." Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.

References

Advisories

Packages

Other links

Timeline

  1. Published
  2. Last updated by the source
  3. Latest EPSS score
AdvisorySeverityWhy it's related
GHSA-r899-h629-j84r
Parse Server vulnerable to stored XSS via malformed Content-Type bypassing file upload extension blocklist
Low Also affects parse-server
GHSA-97pr-9hgg-3p8r
parse-server: LiveQuery discloses object data to a subscriber across an ACL read-access change
Low Also affects parse-server
GHSA-v8x7-r927-cc93
parse-server: Stored XSS via non-standard file extension bypassing file upload extension blocklist
Low Also affects parse-server
GHSA-cgxm-vr2f-6fj8
parse-server: Denial of service via exponential-time processing of deeply nested query operators
High Also affects parse-server
GHSA-wmwx-jr2p-4j4r
parse-server: Relation `$relatedTo` query bypasses `protectedFields` and owning-object ACL
Medium Also affects parse-server
GHSA-75v4-m273-5j49
parse-server: Endpoints `/login` and `/verifyPassword` disclose MFA secrets and protected fields when `_User` get is denied
Medium Also affects parse-server
GHSA-7wqv-xjf3-x35v
parse-server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist
Low Also affects parse-server
GHSA-p84r-h6rx-f2xr
parse-server: Server option routeAllowList is bypassable through batch sub-requests
Medium Also affects parse-server
Is this in your code?

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