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CVE-2019-25544· NVD / CVE Program· CNA VulnCheck

Pidgin 2.13.0 Denial of Service via Malformed Username

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: farstream (SUSE:Linux Enterprise Server 12 SP5-LTSS) 0.2.8-5.2.4; gssdp (SUSE:Linux Enterprise Server 12 SP5-LTSS) 0.14.16-7.2.1; gupnp (SUSE:Linux Enterprise Server 12 SP5-LTSS) 0.20.18-8.5.2.

Low priority for now. Upgrade to farstream (SUSE:Linux Enterprise Server 12 SP5-LTSS) 0.2.8-5.2.4; gssdp (SUSE:Linux Enterprise Server 12 SP5-LTSS) 0.14.16-7.2.1; gupnp (SUSE:Linux Enterprise Server 12 SP5-LTSS) 0.20.18-8.5.2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Pidgin 2.13.0 contains a denial of service vulnerability that allows local attackers to crash the application by providing an excessively long username string during account creation. Attackers can input a buffer of 1000 characters in the username field and trigger a crash when joining a chat, causing the application to become unavailable.

MediumCVSS 6.9 · v4.0—No exploit Fix available
Published
Mar 21, 2026
Updated
Jun 16, 2026
EPSS
0.2% · 8th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
6.9
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
pidginpidgin

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • pidgin pidgin2.13.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • Pidgin Pidgin

    • 2.13.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
SUSE:Linux Enterprise Server 12 SP5-LTSSfarstreambefore 0.2.8-5.2.40.2.8-5.2.4
SUSE:Linux Enterprise Server 12 SP5-LTSSgssdpbefore 0.14.16-7.2.10.14.16-7.2.1
SUSE:Linux Enterprise Server 12 SP5-LTSSgupnpbefore 0.20.18-8.5.20.20.18-8.5.2
SUSE:Linux Enterprise Server 12 SP5-LTSSgupnp-igdbefore 0.2.4-6.2.20.2.4-6.2.2
SUSE:Linux Enterprise Server 12 SP5-LTSSlibgntbefore 2.14.3-4.3.82.14.3-4.3.8
SUSE:Linux Enterprise Server 12 SP5-LTSSlibnicebefore 0.1.13-7.2.30.1.13-7.2.3
SUSE:Linux Enterprise Server 12 SP5-LTSSpidginbefore 2.14.8-3.9.32.14.8-3.9.3

Same product

pidgin: all records

Other highest-scoring records for the same primary product.

  • CVE-2009-2694The msn_slplink_process_msg function in libpurple/protocols/msn/slplink.c in libpurple, as used in Pidgin (formerly Gaim) before 2.5.9 and A
    46Plan
  • CVE-2013-6490The SIMPLE protocol functionality in Pidgin before 2.10.8 allows remote attackers to have an unspecified impact via a negative Content-Lengt
    44Plan
  • CVE-2017-2640An out-of-bounds write flaw was found in the way Pidgin before 2.12.0 processed XML content.
    41Plan
  • CVE-2009-1376Multiple integer overflows in the msn_slplink_process_msg functions in the MSN protocol handler in (1) libpurple/protocols/msn/slplink.c and
    41Plan
  • CVE-2016-1000030Pidgin version <2.11.0 contains a vulnerability in X.509 Certificates imports specifically due to improper check of return values from gnutl
    40Plan
  • CVE-2013-6486gtkutils.c in Pidgin before 2.10.8 on Windows allows user-assisted remote attackers to execute arbitrary programs via a message containing a
    38Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
suse:farstream0.2.8-5.2.4 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:gssdp0.14.16-7.2.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:gupnp0.20.18-8.5.2 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:gupnp-igd0.2.4-6.2.2 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:libgnt2.14.3-4.3.8 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:libnice0.1.13-7.2.3 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:pidgin2.14.8-3.9.3 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage 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.

EPSS, last 120 days

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 researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

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

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-807 · Reliance on Untrusted Inputs in a Security Decision

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records