uiutil.c in FontForge through 20170731 does not validate strings before launching the program specified by the BROWSER environment variable,
uiutil.c in FontForge through 20170731 does not validate strings before launching the program specified by the BROWSER environment variable, which might allow remote attackers to conduct argument-injection attacks via a crafted URL, a different vulnerability than CVE-2017-17534.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Dec 14, 2017
- Updated
- Jun 16, 2026
- EPSS
- 1.8% · 78th percentile
- CWE
- CWE-74
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 1.8%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| fontforge | fontforge | cpe:2.3:a:fontforge:fontforge |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- fontforge fontforgeup to 20170731 inclusive
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | fontforge | before 1:20201107~dfsg-1 | 1:20201107~dfsg-1 |
| openSUSE:Tumbleweed | fontforge | before 20230101-6.1 | 20230101-6.1 |
| SUSE:Linux Enterprise Module for Desktop Applications 15 SP6 | fontforge | before 20200314-150200.3.9.1 | 20200314-150200.3.9.1 |
| SUSE:Linux Enterprise Module for Desktop Applications 15 SP6 | fontforge | before 20200314-150200.3.9.1 | 20200314-150200.3.9.1 |
Same product
fontforge: all recordsOther highest-scoring records for the same primary product.
- CVE-2019-15785FontForge 20190813 through 20190820 has a buffer overflow in PrefsUI_LoadPrefs in prefs.c.40Plan
- CVE-2020-5496FontForge 20190801 has a heap-based buffer overflow in the Type2NotDefSplines() function in splinesave.c.36Monitor
- CVE-2020-5395FontForge 20190801 has a use-after-free in SFD_GetFontMetaData in sfd.c.36Monitor
- CVE-2025-15280FontForge SFD File Parsing Use-After-Free Remote Code Execution Vulnerability35Monitor
- CVE-2025-15275FontForge SFD File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability35Monitor
- CVE-2025-15274FontForge SFD File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability35Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:fontforge | 1:20201107~dfsg-1 · Debian:12 | Package registry (OSV) |
| opensuse:fontforge | 20200314-150200.3.9.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| suse:fontforge | 20200314-150200.3.9.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP6 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- HTTP Request SplittingCAPEC-105likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
- Format String InjectionCAPEC-135likelihood: High · High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.