pearweb: Operator Precedence Logic Error
CVE-2026-25233 is a critical-severity operator precedence logic error vulnerability in pearweb from Pear, with a CVSS 3.1 base score of 9.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected pearweb versions: < 1.33.0. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.36% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of pearweb you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on github.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 7.1 | High | CNA (github.com) |
| CVSS 3.1 | 9.1 | Critical | NVD |
Official description
PEAR is a framework and distribution system for reusable PHP components. Prior to version 1.33.0, logic bug in the roadmap role check allows non-lead maintainers to create, update, or delete roadmaps. This issue has been patched in version 1.33.0.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Operator Precedence Logic Error
The product uses an expression in which operator precedence causes incorrect logic to be used.
How developers prevent this class of flaw
- Regularly wrap sub-expressions in parentheses, especially in security-critical code.
More Operator Precedence Logic Error vulnerabilities (CWE-783)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in pearweb
- 9.8 Critical severity
- 9.8 Critical severity
- 7.5 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
Recent Operator Precedence Logic Error vulnerabilities
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.3 High severity
- 7.8 High severity
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