CVE-2018-20309: foxitsoftware phantompdf Out-of-bounds Read
CVSS: 8.1v3.1HighModified
Published 07-01-2021Last modified 05-08-2024
Vulnerability summary
CVE-2018-20309 is a high (CVSS 8.1) Out-of-bounds Read vulnerability in foxitsoftware phantompdf. EPSS estimates a 0.83% chance of exploitation in the next 30 days, higher than 56.7% of scored vulnerabilities.
CVSS score
8.1/10
010
High · v3.1 (NVD)EPSS score
0.83%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 07-01-2021PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Foxit Reader before 9.5, and PhantomPDF before 8.3.10 and 9.x before 9.5, has a proxyGetAppEdition race condition that can cause a stack-based buffer overflow or an out-of-bounds read.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 8.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
0.83%
Chance of exploitation in the next 30 days
Percentile
57%
Versus all other CVEs
30-day change
+0.01 pp
From 0.82% on 19-09-2026
19-09-202619-10-2026
EPSS score0.83%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.
- CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Foxitsoftware2 products
- phantompdf< 8.3.10 | ≥ 9.0, < 9.5
- reader< 9.5
1 vendor · 2 products