CVE-2019-15321
CVE-2019-15321 is a critical-severity vulnerability in Optiontree Project Optiontree with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (80th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-502
- Affected product: Optiontree Project Optiontree
- Published:
- Last modified:
Description
The option-tree plugin before 2.7.3 for WordPress has Object Injection because serialized classes are mishandled.
Frequently asked questions
- What is CVE-2019-15321?
- The option-tree plugin before 2.7.3 for WordPress has Object Injection because serialized classes are mishandled.
- How severe is CVE-2019-15321?
- CVE-2019-15321 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-15321 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-15321?
- CVE-2019-15321 affects Optiontree Project Optiontree. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2019-15321?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2019-15321 published?
- CVE-2019-15321 was published on 2019-08-22 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:optiontree_project:optiontree:*:*:*:*:*:wordpress:*:*
More vulnerabilities in Optiontree Project Optiontree
- CVE-2019-15320 — Critical (CVSS 9.8): The option-tree plugin before 2.7.3 for WordPress has Object Injection because the + character is mishandled.
- CVE-2019-15319 — Critical (CVSS 9.8): The option-tree plugin before 2.7.0 for WordPress has Object Injection by leveraging a valid nonce.
- CVE-2016-10895 — Medium (CVSS 6.1): The option-tree plugin before 2.6.0 for WordPress has XSS via an add_list_item or add_social_links AJAX request.
- CVE-2015-9320 — Medium (CVSS 6.1): The option-tree plugin before 2.5.4 for WordPress has XSS related to add_query_arg.
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